Y61 TB48 GU Front Calipers and Disks on GQ Y60

[symmetry4wd]

Hello,

Quick question,

Will Y61 TB48 GU Front Calipers and Disks fit under 16" steel wheels, or is 17" the minimum?

Thanks!

[Alex Roux]

Hello,

Quick question,

Will Y61 TB48 GU Front Calipers and Disks fit under 16" steel wheels, or is 17" the minimum?

Thanks!

Yes, you can fit 16" rims onto a GRX. Not smaller than that though.

[mvcoller]

Smaller rims do contain the heat (hot air) in the area of the disc and calliper more that a 17" rim would, and may lead to brake fade in certain instances.

Just a casual observation with experience with rim size when I used to race cars on the track,.... In the class we raced, we could fit a rim one inch down and one inch up from standard. Early 1750 Alfa Berlinas came with 15" rims and later ones came with 14" rims, so we could use 13", 14", 15" and 16" rims. This meant we did not have to change diff ratios to suit a particular track, we just took the right diameter rims and tyres that suited the particular track.

Lichtenburg was a short tight track and 13" rims were our choice, but anything more than 10 laps, caused us to run out of brakes, even with cold air brake ducts fitted. For a 1 hr race (once a year they had an all comers 1 hr race) we ran 15" rims and never had the problem.

Yes, one cannot compare that directly with a Patrol on the road or on a trail, but when driving for instance in Swaziland, from Mbabane down to the Ezulwini Valley with a camp ready Patrol, I did run out of brakes down that 3 km long steep windy piece of highway down into the valley, so it can and does apply to an extent...

[symmetry4wd]

Smaller rims do contain the heat (hot air) in the area of the disc and calliper more that a 17" rim would, and may lead to brake fade in certain instances.

Just a casual observation with experience with rim size when I used to race cars on the track,.... In the class we raced, we could fit a rim one inch down and one inch up from standard. Early 1750 Alfa Berlinas came with 15" rims and later ones came with 14" rims, so we could use 13", 14", 15" and 16" rims. This meant we did not have to change diff ratios to suit a particular track, we just took the right diameter rims and tyres that suited the particular track.

Lichtenburg was a short tight track and 13" rims were our choice, but anything more than 10 laps, caused us to run out of brakes, even with cold air brake ducts fitted. For a 1 hr race (once a year they had an all comers 1 hr race) we ran 15" rims and never had the problem.

Yes, one cannot compare that directly with a Patrol on the road or on a trail, but when driving for instance in Swaziland, from Mbabane down to the Ezulwini Valley with a camp ready Patrol, I did run out of brakes down that 3 km long steep windy piece of highway down into the valley, so it can and does apply to an extent...

That makes a lot of sense
Interesting, thanks

[Tinus lotz]

Just upgrade to drilled and slotted terrain taimer disks will be very impressed