Simagic wheel compatibility: QR50 and QR70 are bolt circles, and the base generation decides the rest

A Simagic quick release is one product with two variants, and the number in each variant’s name is a measurement. The QR50 is a 50mm bolt circle and the QR70 is a 70mm one, sold at one price on one listing whose entire description is a single pairing sentence. Neither is a tier, neither is newer than the other, and choosing between them is a question about which rim you own rather than which base. What does gate compatibility across Simagic’s range is the base generation: an Alpha EVO takes any Simagic wheel and, through a separate $89 adapter, third-party wheels too, while the older Alpha, Alpha Mini, and Alpha Ultimate need a Maglink part for Simagic’s own current wheels and are ruled out of the adapter by name.

Every price, count, quotation, and drawing callout below was read on Simagic’s own store, its /pages/ specification surfaces, and its CDN-hosted PDF manuals on 3 August 2026.

The QR50 and the QR70 are bolt circles, sold as one listing at one price

Simagic sells three quick-release parts. Two of them are variants of a single product.

Part	How Simagic sells it	US regular price, 3 August 2026	SKU
QR50	The “QR50 Half” variant of the “QR70/QR50 Quick Release” listing	$79.00	10708-0027
QR70	The “QR70 Half” variant of the same listing	$79.00	10708-0001
QR-A	Its own listing, “Simagic QR-A”	$89.00	10708-0068

The two halves are one price and one page. Simagic’s Style dropdown offers “QR70 Half” and “QR50 Half” and nothing else, and the listing carried a $49.00 price against a $79.00 compare-at figure on the read date, so $79.00 is the regular price and the $49.00 is that day’s discount. The QR-A quoted $89.00 against an $89.00 compare-at, which is no discount at all.

The number is a millimeter figure, and Simagic’s drawings say so. The FX Formula’s dimension sheet prints “Quick Release Mounting Holes: 50mm x 3-M5”. The Neo X sheet prints the same line four times with two different numbers: “Quick Release Mounting Holes: 50mm x 6-M5” under the Neo X-310G, the Neo X-330R, and the Neo X-330T, and “Quick Release Mounting Holes: 70mm x 6-M5” under the Neo X-350W. The QR-A’s own quick guide gives both circles on one part, “Outer bolt circle: 70mm” and “Inner bolt circle: 50mm”, over “Screw specification: M5 (thread depth: 6mm)”, and its dimension sheet draws three diameters, ∅50mm, ∅70mm, and ∅87mm.

Only one of the three parts is documented. The QR-A listing links a quick guide and a dimension sheet. The QR70/QR50 listing links no document of any kind, carries no specification table and no contents list, and states one sentence.

Simagic’s one pairing sentence splits its wheels, and its own catalog does not divide the same way

The whole of the QR70/QR50 listing’s description, byte for byte, is:

QR70 for GT1 series & P-325D & P-330R series , QR50 for other series

The space before the comma is Simagic’s. The sentence names three families and sends everything else to the QR50.

Two of the three are rim options rather than wheels. The P-325D and the P-330R are choices inside two hub listings. The GT Pro Hub sells “HUB & P-330R”, “HUB & P-325D”, and “HUB & P-325C” in leather and suede, and the Neo X Hub sells twelve configurations built on the same P-325D and P-330R. So the sentence splits rims that bolt to the same hub, since the P-325C sits on the GT Pro Hub listing beside the two named rims and is not named. Nothing Simagic publishes says what separates them.

The third is the wheel whose own table cannot confirm it. The GT1 Steering Wheel’s specification table on /pages/details-gt1 prints “Quick Release” against “Included” and names no part. That row cannot be trusted, because the three rows above it are mispaired: “Building Material” and “Diameter” both read ”-”, while “Net Weight” reads “CNC Aluminum Alloy”, “Shifter Paddles” reads “330mm”, and “Clutch Paddles” reads “1.95kg”. A net weight is not a material and a paddle count is not 330mm. Every other Simagic wheel table read that day pairs its rows sensibly, so the offset is this table’s alone, and it lands on the one wheel the pairing sentence sends to a different part.

The Neo X drawing puts a wheel on 70mm that the sentence does not name. The Neo X-350W’s callout reads “70mm x 6-M5” where its three siblings read “50mm x 6-M5”, and no Neo X product appears in the QR70 list. Simagic publishes both and reconciles neither.

Every Simagic wheel that names a quick release names a 50mm one

Simagic’s Steering Wheels collection page printed “17 products” on 3 August 2026 and its own collection JSON served 17. Two of the 17 are replacement-rim listings that bolt to a Zeus wheel rather than to a base, the Zeus Sport Replacement Rims and the Zeus GT Replacement Rims. Two more are bundles of products already on the list, the GT NEO Bundle (SKU 10204-0013+10708-0032, a GT Neo and a $19.90 MagLink) and the Zeus Wheel + MagicDash 4 Bundle (SKU 10204-0010+10708-0058, a Zeus Formula and a $199.00 MagicDash 4). That leaves 13 listings that attach to a base, and this is what each one’s own Simagic surface says.

Listing	What Simagic states about its quick release	Where
GT Neo	”SIMAGIC QR50 Included”	/pages/details-gt-neo and the GT Neo user guide
GTS Steering Wheel	”SIMAGIC QR50 Included”	/pages/details-gts
GTC Steering Wheel	”SIMAGIC QR50 Included”	/pages/details-gtc
FX Formula Steering Wheel	”SIMAGIC QR50 Included”	/pages/details-fx and the FX user manual
FX Pro Formula Steering Wheel	”SIMAGIC QR50 Included”	/pages/details-fx-pro
Simagic Neo X Hub	”SIMAGIC QR50 Quick Release” under Accessories; “SIMAGIC QR70 Quick Release” under Optional Accessories	/pages/details-neo-x
NEO X Series Steering Wheels	The same two rows, on the same table	/pages/details-neo-x-wheel
Simagic Zeus Formula	”50mm Zeus Quick Release”	/pages/detail-simagic-zeus-formula-steering-wheel
Simagic Zeus Sport	”50mm Zeus Quick Release”	/pages/detail-simagic-zeus-sport-steering-wheel
Simagic Zeus GT	”50mm Quick Release”	/pages/detail-simagic-zeus-gt-steering-wheel
GT1 Steering Wheel	”Included”, naming no part	/pages/details-gt1
GT Pro Hub	”Included”, naming no part	/pages/details-gt-pro-hub
GT Pro HUB(K)	“Included”, naming no part	/pages/details-gt-pro-hub-k

Ten of the 13 name a 50mm part. Three name none. Not one names a QR70 as included, and the single QR70 mention across all 13 is the Neo X’s optional-accessories row, where it sits beside “Maglink, Separate Purchase Required, Wheel Rim”.

Two manuals say the quick release arrives already fitted. The Zeus GT’s package block reads “Zeus QR50 quick-release (pre-installed)” for both the screen and no-screen versions, and its accessory list repeats it as “Zeus QR50 Quick Release (Pre-installed)”. The Zeus Sport’s manual says the same for both of its versions. Those two are the only places any Simagic document read here attaches that word to a quick release, and elsewhere in the same two manuals it describes firmware instead.

One wheel disagrees with its own manual. The FX Pro’s detail page prints “SIMAGIC QR50 Included” where its user manual’s identical row prints “Included” alone. The FX Formula’s two surfaces both print the QR50.

Where the quick release arrives as loose parts, Simagic ships the screws. The GT Pro Hub’s manual lists a “Quick Release Installation Kit: (Allen Key (3mm) x 1/Countersunk Head Screw M5-16 x 6)” among its accessories, which is six M5 screws and a tool, matching the “6-M5” the Neo X drawings call out. The GT Neo’s accessory list holds an Allen key, a connection cable, two sticker sets, and tweezers, with no quick release among them, and the same document’s specification table says a QR50 is included, so the accessory list is not the box list.

Fifteen Simagic wordings for the 50mm part

Across the 13 wheel and hub specification surfaces, the five base surfaces, the store listing, and the 14 manuals that carry a text layer, Simagic names its own 50mm part fifteen different ways. Case, hyphenation, and parentheses count as differences, because Simagic varies all three. Two kinds of string are left out, named here so the count can be rerun: the “Quick Release Mounting Holes” callouts, on the dimension sheets and repeated in the FX manual, which give a hole pattern rather than a name and are quoted further up this page, and the two sentences that claim compatibility with 50mm parts in general instead of naming Simagic’s, the GT Neo user guide’s “Compatible with most 50mm and 70mm quick-release systems.” and the Neo X pages’ “Supports most mainstream 50mm and 70mm quick-release systems.”

Wording	Where
”SIMAGIC Quick Release (QR50)“	The Alpha EVO user guide’s “1.4 Optional Accessories” list, the EVO Ultra user manual, and the EVO Ultra’s Compatible Accessories row
”SIMAGIC QR50”	The Alpha EVO three-column table, inside “Full support for SIMAGIC QR50 & QR70 & QR-A"
"SIMAGIC QR50 Included”	Five wheel specification tables, the GT Neo, GTS, GTC, FX Formula, and FX Pro, and the same row again in the GT Neo and FX manuals
”SIMAGIC QR50 Quick Release”	The Neo X Hub and NEO X Series Accessories rows
”50mm SIMAGIC Quick Release”	The FX and FX Pro feature icons
”50mm SIMAGIC patented quick release.”	A prose block on the FX Pro’s detail page
”50mm Zeus Quick Release”	The Zeus Formula and Zeus Sport specification tables, and the Zeus Formula manual’s
”50mm Quick Release”	The Zeus GT specification table
”Zeus QR50”	The Zeus GT and Zeus Sport manuals’ Quick Release rows
”Zeus QR50 Quick Release”	The Zeus Formula manual’s “Included Accessories” row, and both accessory lists under its “1.3 Package Contents"
"Zeus QR50 quick-release (pre-installed)“	The Zeus GT and Zeus Sport manuals’ “Included in the package” rows
”Zeus QR50 Quick Release (Pre-installed)“	The Zeus GT and Zeus Sport manuals’ “1.3 Package Contents”, in the screen and no-screen list of each
”QR50 Quick Release”	The callout on the Zeus GT and Zeus Sport exploded diagrams
”QR50”	The Zeus Formula’s version of that same callout, and the pairing sentence on the store listing
”QR50 Half”	The store listing’s Style dropdown

The three Zeus manuals are where the drift is worst. The Zeus GT alone prints the one part four ways inside one document: “Zeus QR50” in its specification table, “Zeus QR50 quick-release (pre-installed)” in the row of that same table headed “Included in the package”, “Zeus QR50 Quick Release (Pre-installed)” in both of its 1.3 Package Contents lists, and “QR50 Quick Release” on its exploded diagram. The Zeus Sport manual prints the same four. The Zeus Formula manual, covering the same generation and the same coupling, prints three others: “50mm Zeus Quick Release” in its specification table, “Zeus QR50 Quick Release” in its accessories row and both package lists, and a bare “QR50” on its diagram.

Seven further wordings name a quick release without naming which one. “Simagic Quick Release” is the row label on the Alpha, Alpha Mini, and Alpha Ultimate specification tables, and those same three pages carry “Patented Simagic Quick Release” as a feature label. “SIMAGIC Quick Release” in capitals labels a feature icon on the GT1 and the GTS. The GT1 also runs “Patented Quick Release” as a banner headline, over “Snaps on, locks in. A fan-favorite solution, without any need for tools.” The shared Alpha family user guide’s feature list has “Patented Speed Magic Quick Release: Swap wheels in under 1 second”, the GT Neo user guide’s has “Star Ring Quick-Release System: Larger press area for easier detachment.”, and the EVO Ultra’s FAQ calls the coupling “the magnetic-coupling quick-release system”. A bare “Quick Release” labels a specification row on most of these pages, but that is the field name rather than a name for the part, so it is not counted here.

The base generation decides more than the quick release does

Simagic answers the base question three different ways, and the differences are generational rather than editorial.

Base	What its own specification surface says	US regular price, 3 August 2026
Alpha EVO Sport (9Nm), Alpha EVO (12Nm), Alpha EVO Pro (18Nm)	“Full support for SIMAGIC QR50 & QR70 & QR-A”, identical in all three columns	$399.00, $549.00, $699.00
Alpha EVO Ultra (28Nm)	Files “SIMAGIC Quick Release (QR50)”, “SIMAGIC Quick Release (QR70)”, and “SIMAGIC QR Adapter (QR-A)” under Compatible Accessories	$969.00
Alpha Mini, Alpha, Alpha Ultimate	”Simagic Quick Release” against “Optional”, identically on all three tables	$399.00, $649.00, $899.00

“Full support” is a compatibility claim, not a part in the box. None of the four EVO listings puts a quick release in its contents, and the Alpha EVO user guide files all three parts under “1.4 Optional Accessories”. The shared three-column table on /pages/alpha-evo runs a header row and twelve specification rows, counted by parsing its <tr> elements, and the Quick Release row is the eighth of the twelve.

On the older family, Simagic calls it optional in so many words. The Alpha, Alpha Mini, and Alpha Ultimate tables are identical apart from torque, dimensions, and weight, and all three read “Simagic Quick Release” against “Optional”. Their shared user guide lists “Quick Release” in its own optional-accessories block, between the desk fixture and the table clamp.

Simagic’s current wheels reach the older bases through a different part entirely. Each of the three Zeus manuals heads one section “Connecting to Alpha EVO Wheelbase”, where the wheel simply locks on, and the next “Connecting to Other Wheelbase or PC”, where it does not: “When using the wheel with M10, Alpha Mini, Alpha, or Alpha U, an additional Maglink Pro or Maglink Pro Xtend is required.” The instruction that follows sends the data around the base rather than through it, “Connect to the PC. (Do not connect to the USB port on the wheelbase).” The two parts are $45.00 and $89.00, and the Maglink Pro Xtend’s listing states its job in Simagic’s own spelling: “For Zeus/Neo series to compatiable with Alpha wheelbase”. All three Zeus manuals put it more loosely in their feature lists, once each: “Maglink Pro: Smooth integration with Alpha or third-party Wheelbases.”

Front-mounting the base costs you the coupling’s magnetic half. The Alpha EVO page footnotes its four mounting positions with “Note: Side/Front/Desktop mount brackets are optional accessories, sold separately. Front bracket installation disables all magnetic connectivity. Avoid installation if magnetic accessories are needed.” The EVO Ultra’s FAQ names the casualty directly: “Front-mount plates will block the magnetic QR interface”. The same FAQ explains what that interface is, “It is an integrated connector that handles both power and data. Building on traditional contact-based QR, it adds magnetic buffering to enhance data stability”. So the $49.00 front bracket and a wheel that needs the magnetic path are a choice, not a pair.

The QR-A carries a third-party wheel’s data, and four bases are ruled out by name

The $89.00 QR-A is the one Simagic part that admits hardware from outside the ecosystem. Its listing says what it mounts: “Seamlessly mount third-party steering wheels with a standard 70mm hole pattern onto Alpha Evo Wheelbase.” The spelling “Alpha Evo” is Simagic’s.

It is a USB bridge, not just a bolt pattern. Its quick guide ships “USB-A to USB-C Data Cable x 1”, rates the part at “Max output: 5V⎓1.5A MAX”, and routes the wheel’s data through the base’s second input: “The base must be connected to the PC via the INPUT2 port.” That is the Type-C interface the Alpha EVO’s own quick guide describes as “for third-party USB steering wheels and USB enhanced input interfaces”. The EVO Ultra’s Compatible Devices row files this as its third class of wheel, after “Next-Gen Steering Wheels (CAN FD)” and “Legacy Steering Wheels (2.4G)”: “Third-Party Steering Wheels via QR-A Adapter (USB)”.

Simagic hedges its own adapter twice. The same quick guide warns that “Due to differences in hardware communication protocols, some third-party devices may have limited compatibility. Please verify before use.” and closes with the hard limit: “This product is NOT compatible with M10, Alpha Mini, Alpha, or Alpha U bases.” Nothing on the QR-A’s store listing says either of those things. The guide also names the wheel it was drawn on, “Illustrations are based on the Cube Controls GT Pro steering wheel”, naming no revision, where the wheel with a review here is the Cube Controls GT Pro V2.

Bought with a base, the adapter costs exactly its own price, and one bundle has two prices. Simagic sells the QR-A bundled with each of the three Alpha EVO tiers, at $488.00, $638.00, and $788.00 regular, which is $89.00 over $399.00, $549.00, and $699.00 to the dollar. The 12Nm bundle is where the two listings that sell it disagree: SKU 10708-0068+10104-1002 quoted $638.00 on the QR-A’s own page and $609.00 on the Alpha EVO base’s page on the same day, because the base listing discounted it and the QR-A listing did not. The QR-A listing’s compare-at field for all three bundles reads $89.00, below every price it sits next to, so the regular figures above come from the base listing.

What a “Half” is, and the question Simagic leaves open

Simagic explains the coupling in exactly one sentence, and repeats it across almost every manual it publishes:

The quick release assembly contains 6 steel balls on the top half, and 4 steel balls on the bottom half.

Seventeen Simagic guides and manuals were read on 3 August 2026 and fourteen carry a text layer. The sentence is in eleven of the fourteen: the GT Neo user guide and quick guide, the FX and FX Pro manuals, the GT Pro Hub manual, the Neo X Hub quick guide, all three Zeus manuals, and both Alpha family base manuals. The three it is absent from are the whole of the EVO family’s documentation, the Alpha EVO user guide, the Alpha EVO quick guide, and the EVO Ultra manual, none of which describes fitting a wheel at all. The other three PDFs carry no text and are not counted either way.

The illustration puts both halves on the wheel. On the Zeus GT’s page 12, read off the page rendered at 110 dpi, the “6 steel balls” and “4 steel balls” callouts both point into the round fitting on the back of the wheel, and the base’s shaft is drawn separately beside it under “Line up with the wheelbase”. The step below reads “the quick release will lock utomatically”, missing a letter that the Zeus Sport and Zeus Formula manuals both have in the same sentence.

The word “half” in the manuals therefore describes two rings of one part, which is not what it means in the store, where “QR50 Half” and “QR70 Half” differ from each other by a bolt circle rather than by which end of an assembly they are.

So the $79 question stays open. A Simagic wheel arrives with a quick release, on ten of the 13 listings by name. A Simagic base arrives with none, and on the three older bases Simagic calls one “Optional”. Whether the wheel’s included part covers both ends of the coupling, or whether the base needs a purchase of its own, is not stated on the QR listing, on any base listing, in any base manual, or in any wheel manual read here. A shopper pricing a Simagic base and a Simagic wheel has a $79.00 exposure that no Simagic document read on 3 August 2026 closes.

The Alpha family bases at least point one way. Their own tables call the quick release “Optional”, which is Simagic saying a purchase is involved on those three. The four EVO listings say “Full support” instead, which says nothing about who supplies the part.

What to check before you order

On the wheel. Whether its own specification table names a 50mm part. Ten of the 13 do, and for the other three, the GT1 and the two GT Pro Hubs, “Included” is the whole answer Simagic gives. If your rim is a P-325D or a P-330R, or the wheel is a GT1, the pairing sentence sends you to the QR70 and no Simagic wheel page confirms it.

On the base. Which generation it is, because that decides more than the quick release does. An Alpha EVO or EVO Ultra takes all three parts. An Alpha, Alpha Mini, or Alpha Ultimate takes the quick release as an optional purchase, needs a $45.00 Maglink Pro or an $89.00 Maglink Pro Xtend before a Zeus or Neo wheel will work on it, and is ruled out of the QR-A by name.

On a third-party wheel. Whether it has a 70mm or 50mm M5 pattern and whether you can live with USB. The QR-A gives you both circles and a data path, and Simagic asks you to verify the wheel first.

Before front-mounting anything. Whether your wheel needs the magnetic connection. The front bracket disables it, and Simagic says so on two different pages.

The cross-brand version of all of this, including which rims bolt to which adapters and where the button data stops, is in wheel rims and quick-releases. For the other two manufacturers with a versioned quick release, see the Fanatec QR2 guide and the Thrustmaster quick release guide, and for the one that versions a whole connection platform instead, the Simucube Link guide. For the bases themselves, see the Simagic Alpha EVO, the Alpha, and the Alpha Mini, and for two of the wheels counted above, the GT Neo and the FX Pro.

Sources

Every Simagic URL below returned HTTP 200 on 3 August 2026, fetched with a browser user agent, and every price, count, quotation, and drawing callout above was read that day. Store prices are the price and compare_at_price fields in each listing’s own product JSON, which matched the figures printed on the page; a compare_at_price above the current price is recorded here as the regular price and the difference as that day’s discount.

• The three parts: QR70/QR50 Quick Release at $79.00 regular, $49.00 on the day, for the pairing sentence, the two “Half” variant names, and SKUs 10708-0001 and 10708-0027; and Simagic QR-A at $89.00, SKU 10708-0068, for the third-party mounting sentence and the three bundle variants. The QR-A’s two linked documents, a quick guide and a dimension sheet, are the only documents either quick-release listing links. The quick guide is a single page with no extractable text, so its bolt circles, power figure, INPUT2 instruction, and all four of its Notes were read off the page rendered at 400 dpi; the dimension sheet’s three diameters come from its text layer.
• The wheel census: Simagic’s Steering Wheels collection, which prints “17 products” and whose own products JSON serves 17, and the specification tables behind them. Ten of the thirteen build their table out of Simagic’s feature-chart label-and-value pairs, and those were parsed as pairs: GT Neo, GTS, GTC, FX, FX Pro, Neo X and Neo X wheels, GT1, GT Pro Hub and GT Pro Hub(K). Reading the GT1’s offset is a comparison against the other nine, every one of which pairs its rows sensibly. The three Zeus pages, Formula, GT, and Sport, use an ordinary two-cell <tr> table instead and were read from that. The two bundles’ contents come from their own SKUs on GT NEO Bundle and Zeus Wheel + MagicDash 4 Bundle, resolved against MagLink at $19.90 and MagicDash 4 at $199.00.
• The bases: Alpha EVO for the three-column table, its twelve specification rows, and the mounting footnote; Alpha EVO Ultra for Compatible Devices, Compatible Accessories, and the two FAQ answers about the magnetic-coupling quick release; and Alpha, Alpha Mini, and Alpha Ultimate for the “Simagic Quick Release” / “Optional” row that all three share. Prices from the listings: Alpha EVO 9Nm/12Nm/18Nm, Alpha EVO Ultra, Alpha Mini, Alpha, and Alpha Ultimate. The base listing and the QR-A listing are the two pages quoting SKU 10708-0068+10104-1002 at different prices. Simagic’s three-base Alpha grouping is /collections/alpha; /collections/alpha-series is a different set, seven steering wheels and hubs with no base among them.
• The manuals, all under cdn.shopify.com/s/files/1/0764/6756/8943/files/, read through pdftotext -layout: Alpha EVO user guide for “1.4 Optional Accessories”; Alpha EVO quick guide for the Type-C interface line; EVO Ultra user manual; Alpha / Alpha Mini / Alpha Ultimate user guide and the older Alpha manual; GT Neo, FX, FX Pro, and GT Pro Hub for the package contents and the installation kits; and the three Zeus manuals, Formula, GT, and Sport, for the preinstalled QR50, the two connection sections, and the Maglink requirement. Two further guides carry the steel-balls sentence and nothing else quoted here, the GT Neo quick guide and the Neo X Hub quick guide. Seventeen guides and manuals were fetched in all; the three that return no text at all are the QR-A quick guide, the Neo X steering wheels quick guide, and the four-model Neo X quick guide, so their silence is not counted as an absence. The Zeus GT’s page 12 is the one page rendered rather than read as text, at 110 dpi, for the two steel-ball callouts’ placement.
• The dimension sheets, for the bolt circles: FX, Neo X, and GT Pro Hub.
• The bridging parts, for their prices and their descriptions: Maglink Pro at $45.00 and Maglink Pro Xtend at $89.00, whose listing carries the “compatiable” line; and the EVO front mounting bracket at $49.00, the part the magnetic warning is about.