just wanted to know what you guys are using. trackday tires, size, brand, and also what psi is a good starting point. thanks

i have 120/70/17 and 150/60/17, mc28, supercorsa, front is rs250 forks and marchisini front rim. thanks

I run super corsa's on most of my bikes, really like them.

If your running the 3.5" RS front wheel then I would go with the 120 your using now or the 115/120 if you want to run a slick.

The 150 will be perfect for the 4.5" rear wheel unless you have the RS 5.00 or 5.25 which should really run a 160.

Tyre pressure really depends on the day.
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If I have to take the carbs off once more...

ok, i also heard that a 120/60/17 would be better then a 120/70/17 for the NSR with RS250 front end is this true? while rear remain stock nsr with a 150/60/17. power races come in this size. thanks.

Personaly I like a 120/60 over a 120/70 but then again I think that more down to what I'm used too.
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If I have to take the carbs off once more...

Logic dictates a 120/60 over a 120/70 every time.

120/60 is much closer in profile to a 110/70 than a 120/70 will ever be, and we all know how well the stock sizes work.
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Andy.
NSR-WORLD.COM

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gpr70's front
gpra10's rear

ruthless and expensive tyres,

I run GPR70 Front and Rear, very nice....but bit cost more.....

Bridgestone 090ss is also nice...
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1996 HONDA RS250
1995 MC28 NSR250 SE red/white/green
1994 MC28 NSR250 sp W/ RS250 engine

Gpr70 are now discontinued. Only the a10 (alpha 10) available now unless you can find old stock. I am on 70's and looking forward to trying the 10's. The 70's are quite a heavy tyre by modern standards so the 10's address this + use more modern construction/materials.
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http://www.rgv250.co.uk
http://www.thetuningworks.com

Had a good look at some of the new Alpha 10s today. They certainly look and feel the part. Always preferred Bridgstone BT090s over the Dunlops, but I think I'll give them a go this summer.

Wb

are the a10s avalible in the US? i have not seen anyone sell/ride these types of tires? thanks

I ran 28 psi front 30 rear on an MC21 with std wheels. Most would run 30/32 to start

You will need to drop them a lot from the standard road pressures to get the tyres to work.

GPR's were great and seemed to last quite well.

- 10 year old Japanese Bridgestones were 'interesting' at a cold wet Oulton Park. I got down to 25/27 which was better if a tad squirrely, but still not getting hot enough. (I weighed only 8 and a half stone at the time - better now).


Mike

I'm runing Michelin power race 120/60 160/60 on the NSR can't quite scrub them to the edges. I think because of the standard size rims.
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1995 A kit TZ 250
1994 Rothmans NSR 300sp SOLD
1998 RM 250 freestyle/motorcross
1998 Meathanol burning CR 500 AF super retard/motorcross/sand dunes/play bike