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When you heading out to test them? I have set also, fresh Trofeos but have gone 245 on front and 305 on rears in 19's
I'm at the SMP on the 24th
i'm doing the driving solutions / ARDC day on the 24th, afternoon session, but i'm still on worn out dunlops, really getting my moneys worth outta these suckers
wouldn't mind going down the 19" path, anyone want to depart with some wheels out there
i'm doing the driving solutions / ARDC day on the 24th, afternoon session, but i'm still on worn out dunlops, really getting my moneys worth outta these suckers
wouldn't mind going down the 19" path, anyone want to depart with some wheels out there
You can order some Koya's and they will probably be made in time. These took 2 weeks to be made and delivered.
We should book an ARDC day and get a few of us together for some fun. Eastern Creek is much closer and more convenient than Wakefield.
Actually Charlie when you have the 19's on can you let me know if the car scrapes a lot more or not, 19's could be a nightmare for me and my driveway
I am doing the morning session on the 20th but in a private group so we won't be able to run together.
The 19s will mean about 15mm less clearance which is not good for me either, the car scrapes in my driveway as it is, luckily I have a double entrance to go in on an angle and it just makes it.
Will get the wheels on tonight or tomorrow morning to test fit and will post a pic of them on.
Are you guys not increasing sidewall height with the downsized wheels? Surely diameter would remain similar if you did?
Sizes are difficult. The tyre size remains the same but you lose the diameter in rim size. Go from a 295/30/20 to 295/30/19, same amount of rubber but less rim. So lose 12.5mm in road clearance.
Front goes from 245/35/20 to 235/35/19. Ideally I would have gone 245/35/19 up front but wasn't sure if they would fit with the new rims and they didn't have stock. So the front you almost have the same amount of rubber but less rim, so lose just about 15-16mm of road clearance up front.
In saying that all tyres vary in size. I just put new rubber on the front of my OEM 20s so will measure the true diameter of both OEM front and rears and Trofeo R in 19s.
Going from 20 to 19 the tire diameter is smaller. I have found the car is lowered a bit (helpful) and the FD ratio is about 5% higher thus lower gearing which also helps in the highly-geared GT4. You can just look up the tyre charts and work out where you are or where you're going to be. 19's work for me on the track and 20's on the road..
Ill see you out there, I'm also in the afternoon session. trying out the Koyas and the 19's
Originally Posted by O5C4R
i'm doing the driving solutions / ARDC day on the 24th, afternoon session, but i'm still on worn out dunlops, really getting my moneys worth outta these suckers
wouldn't mind going down the 19" path, anyone want to depart with some wheels out there
1) Cayman has always been under tyred to slow it down..I had huge success with my old "R" going up massively in tyre sizes F&R - 245/255 & 295 - Huge grip increase and lap times tumbled..more confidence equalled more speed.
2) The Koyas push the front tracks out quite a bit compared to rears - which will increase the front grip we all seek. Plus I run a teenie tiny bit of toe out which as cured understeer but affected rear balance the..trial and error.
Originally Posted by Charliekay
Any reason you went 305s rear? What size wheel you running at the front?
Just be careful reducing the front footprint...understeer will be more present as you push grip rearward
Originally Posted by Charliekay
Sizes are difficult. The tyre size remains the same but you lose the diameter in rim size. Go from a 295/30/20 to 295/30/19, same amount of rubber but less rim. So lose 12.5mm in road clearance.
Front goes from 245/35/20 to 235/35/19. Ideally I would have gone 245/35/19 up front but wasn't sure if they would fit with the new rims and they didn't have stock. So the front you almost have the same amount of rubber but less rim, so lose just about 15-16mm of road clearance up front.
In saying that all tyres vary in size. I just put new rubber on the front of my OEM 20s so will measure the true diameter of both OEM front and rears and Trofeo R in 19s.
Yes I have the same wheels, sizes and offsets but mine are black..
Booked in for the 24th, keen to see how these wheels and tyres go, we will be in the same group...be gentle on me please.
I think I stole last 245 in the country...sorry.
hi Mungee, just a track day no one has numbers on(except for the C63 driver lol), basically the best time for testing, wouldn't mind seeing your set up as the 19" toyo R888R tyre is looking pretty good. Actually a friend of mine might be bringing a 997 GT2 RS which will be awesome
wow charlie nice garage looks like an art gallery, polished floor is immaculate
08-03-2017, 09:38 AM
