What you’re going to learn from reading this in-depth article on QR adapters will help you decide what adapter you’ll need to mount a QR hub to the wheelbase and what the measurements mean when we’re discussing mounting a wheel rim or complete sim steering wheel. What does “6 x 70mm” PCD mean anyway?

How will you mount your “6 x 70mm” PCD QR hub to your Fanatec DD2? And how does the Simucube 2 Pro work? A lot of the mainstream wheelbase manufacturers have a unique way of fitting QR to the wheelbase, so you’ll need an adapter to get started (most likely!).If you’re dealing with a complete sim steering wheel then clearly the XBOX One hub won’t be for you, but if you don’t fancy the expense of the Fanatec Podium hub, try the Fanatec Emulator from SRM. Sim Racing Machine’s Fanatec Wheel Emulator Steering wheel bolt patterns are relatively standard, in that there are very few to choose from – and they’re influenced heavily by competition steering wheel manufacturers such as MOMO, Sparco and OMP who use the “6 x 70mm” PCD bolt pattern. Next, there’s the issue of how the wheelbase end is actually mounted to the wheelbase. Simucube, Fanatec, Logitech – they’re all different. So in the case of 6 x 70mm PCD, we’re saying there are 6 bolts placed on a diameter of 70mm. And just so you know, most of the time those are M5 (5mm) bolts! Match the steering wheels to the hub to the adapter

To take an early wheel such as a Formula Clubsport Fanatec wheel out of the Fanatec ecosystem, you’re going to need a USB conversion. As Fanatec wheels use the Fanatec QR hub to connect the wheel as a game controller, you will need to convert the wheel to a USB device with this board from Leo Bodnar. Fanatec USB conversion (pre-soldered) fits neatly into existing pins on the board The Ascher adapter will allow a 70mm or 50mm bolt pattern item to mount directly onto the Simucube shaft from which you can attach any QR hub or spacer directly to the wheelbase. Simucube 2 Pro with SQR mount removed to reveal unique 3-hole mount (non-standard, non-PCM) Mounting a Cube Controls wheel to a Logitech WheelbaseThere are a few options. The Fanatec Podium hub is the OEM hub from Fanatec and will accept all third-party rims using a 6x70mm or 3x50mm bolt pattern. Cube Controls wheels all come with a Cube Controls universal hub which will also accommodate 6x70mm or 3×50.8mm bolt patterns. Cube Controls wheel mounted to Fanatec Podium Hub To mount a 70mm PCD wheel to your Logitech wheelbase using the Logitech QR, try this adapter from 3d Works on Etsy. Mounting to a MiGE OSW Wheel When taking off the rim, simply make sure that your wheel rim is centered, then put one hand over the top of the rim’s button plate, and one underneath. Pull the collar towards you, and pull lightly towards you and the rim will slip off with ease.You don’t need to switch anything off before you do this, you can hotswap rims mid race if you want.

The GT Pro Hub by SIMAGIC features a “zero compromise” approach to build quality. The button plate and hub combination consist of a carbon front plate and CNC-machined aluminium housing, as most of them do! The entire structure is robust, durable, and flex-free, offering no compromises when it comes to you being faster. Now you’ve got a good idea of compatibility between wheels, adapters, hubs, and wheelbases, let’s take a look at some of the QR hubs out there, as recommended by sim racers. Fanatec Podium Hub The QR hub alleviates play via the special conical shaft on the wheelbase side of the hub. Compatible with any 70 mm PCD fitment wheel. GT PRO HUB – Simagic The Simucube wheelbases come with an SQR hub supplied. The SQR hub kit will accommodate any 50.8mm or 70mm PCD wheel (the wheel side mount is tapped with M5 threads. Simucube 2 Pro with SQR hub (wheelbase side) attached If you’re not sure which QR hub might suit your Fanatec, Simucube, Logitech, Simagic or OSW MiGE wheelbase, read on or follow the links below:The steering wheel feels much closer to me than I expected. 1.5″ in increased offset is actually quite a lot. It’s OK and I’m going to attempt to get used to it. The main issue I found is that now it requires quite a reach to actuate the signal and wiper stalks on the steering column. I’m aware some guys modify those and bend them a bit closer. For now, I’ll get used to them as they are. The kyostar QR system will fit with a little bit of modification. There’s a handy guide on how to achieve this in the owners’ group on facebook, which i’ll also link in the description below. For those of you interested in this wheelbase, this group is a good resource to hear from the people who actually own these devices. The “PCD measurement” is the way a steering wheel fitment is described. There are usually 6 bolts mounting your steering wheel and most commonly they are arranged on a diameter of 50.8mm or 70mm PCD. PCD stands for Pitch Circle Diameter and it’s the common way to describe a stud pattern: PCD Stud patterns ( source)