Both have a 22mm axle. The bearing part numbers are the same, and both are 3.5 inch width that takes the same 120/70 R17 tyre
I have fitted 320mm discs from an R7. The speedo drive is the same. Just looks like the internal width where the axle fits may be shorter on the Thunderace wheel
Take a look at the picture. Its 5.5 inches or 14 cm. Cant remove my front wheel to measure because I dont have a front paddock stand
I bought the wheel because ad said it was also for a YZF750. The later Foxeye Exup got the same wheel as the YZF, But not convinced because how the disc mounts is different, and the Thundertace came with 298mm discs
If any one has a wheel to hand they could measure it would be much appreciated
Did try to sell the wheel and discs but no interest what so ever
