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[roadrunner055]

Hi to all, ive just bought a terrapin 600 to race next year in sprints and hillclimbs ill be taking it easy to start with as ive only done one sprint so far this year at raf barkston, any tips on where to get tyres avon soft, or any info, im from hampshire basingstoke, so anyone near by into single seaters? and happy new year to all.

[thebear]

I can't help with your parts request but surely someone here can.

Welcome to 10-10ths.

[RPD Motorsport]

Part worn tyres are fairly easy to come by. F3 teams use avons by the bucket load and we (Formula Renault teams) use Michelins by the heap. If your not fussy you can get them for £100/set.

[roadrunner055]

Originally Posted by RPD Motorsport

Part worn tyres are fairly easy to come by. F3 teams use avons by the bucket load and we (Formula Renault teams) use Michelins by the heap. If your not fussy you can get them for £100/set.

thanks for that i could do with a set to keep spare my sizes are front
6.2/20/13 rear 9/21/13 not sure why there 20 and 21 but seem to work ok, i take it the best tyres for sprint hillclimb are super soft ones, mine are avon at the mo been told there soft but not sure how to tell there must be a cde i suppose, if you can help with these sizes let me no.

pete

[RPD Motorsport]

Our tyres are as shown here:

http://rpdmotorsport.com/car.php

That translates to 6.2" wide front and 9" rear, both on a 13" rim. The diam is in metric, 530mm front and 570 rear, roughly 20.8" front and 22.4" rear. If your not really fussy about your ecact ratios then minor diff is no problem so long as you maintain the same rake angle.

For 'softness' you can get a cheap durometer. Bear in mind tyres produce grip by both friction and adhesion - duromiters and rubber 'softness' is only a mesure of the frictional component (about 40% of a slicks ability) and the compound defines the adhesion.

The Avons I expect you have are soft, but when a month old are only 50% the tyre they were new. Age is a massive factor, much bigger than wear - why we only fit tyres for quali or testing that are less than 3 days from the factory.

If you want to talk about new/part worn tyres email me on:
enquiries@rpdmotorsport.com