Wheel Sizes / Offsets - Road vs Track

Re: Wheel Sizes / Offsets - Road vs Track (Treay81)

Thu, 29 Aug 2013 19:34:25 GMT

so I have put the 215 45's on and whilst I haven't taken it through any hard cornering, it is improved as it didnt scrub in a lot of the usual spots on the first drive. But tomorrow will be the test once i run her to work, might take the putty road then onto the bells line to make sure...

cheers.

Re: Wheel Sizes / Offsets - Road vs Track (track_mr2)

Thu, 29 Aug 2013 10:43:54 GMT

Treay81
The tyre shop I went to insisted I get 215 45's over a 215 40. He was of the opinion they will perform better on the car which sounded to me more like "You have been bugging me on tyre sizes for 2 days, just buy already your pissing me off" but I have little time to deliberate til I go back to work tomorrow so need to get it sorted.

I run 215/40/17 on a 7.5 wide without scrubbing. What your tyre guy probably actually means by the 45's is.......I have a pair sitting in stock I want to get rid of.......

Re: Wheel Sizes / Offsets - Road vs Track (Treay81)

Thu, 29 Aug 2013 09:36:18 GMT

The tyre shop I went to insisted I get 215 45's over a 215 40. He was of the opinion they will perform better on the car which sounded to me more like "You have been bugging me on tyre sizes for 2 days, just buy already your pissing me off" but I have little time to deliberate til I go back to work tomorrow so need to get it sorted.

If all goes to plan and these tyres dont scrub i'll swap down to the 40's next time round. I still have to replace the exhaust manifold and do a clutch yet so I wont go costing myself too much money on tyres if I don't need to be haha.

Re: Wheel Sizes / Offsets - Road vs Track (P E T E)

Thu, 29 Aug 2013 09:07:40 GMT

Also, its pretty hard to find a 17x7 + 17x8 wheel stagger with identical offsets that work well with the MR2! You have a much better chance with the 17x7.5 and 17x8.5.

Re: Wheel Sizes / Offsets - Road vs Track (P E T E)

Thu, 29 Aug 2013 09:06:13 GMT

Yeah, I did a bit a research on good tyre sizing for the car without rubbing can came to the following conclusions:
17x7.5 - 215/40/R17
17x8.5 - either 235/40/R17 (This is the legal tyre size to get for rolling diameter). Also read its better for auto-X to give the most control of the car.
245/40/R17 - This follows the same stagger as the 92+ factory tyre stagger
255/40/R17 - Unless your running a high hp vehicle this can cause alot of understeer due to the large stagger

Re: Wheel Sizes / Offsets - Road vs Track (Senor_2)

Thu, 29 Aug 2013 08:50:30 GMT

Any particular reason you're running a 45 series on the front?
It's usually more common (and closer to stock rolling diameter) to run a 40 series tyre on a 17" rim, I'm running a 215/40 on a 7.5" wide front rim without any scrubbing issues for example.

Re: Wheel Sizes / Offsets - Road vs Track (MR2QIK)

Thu, 29 Aug 2013 00:21:47 GMT

The rubbing should be eliminated with 215 fronts. 225 fronts are frequently troublesome to fit. Much easier solution & you get to keep the lovely ssr's :)

Re: Wheel Sizes / Offsets - Road vs Track (TIPSIDUECE)

Wed, 28 Aug 2013 21:32:49 GMT

what offsets are ur wheels? i actually prefer ur wheel sizes than mine (17x8/17x9-both +35 offset) im running 215's fronts on eibach lowered springs with no scrubbing whatsoever.

Re: Wheel Sizes / Offsets - Road vs Track (Treay81)

Wed, 28 Aug 2013 21:27:15 GMT

I have ordered the 215's but they are only giving me an additional 6mm clearance from the overall diameter. I hope this at least reduces the scrubbing but doubt it will eradicate it. (on the other hand im happy to be proven wrong in this instance).

I'm getting them fitted tomorrow so I'll post how they go.

Re: Wheel Sizes / Offsets - Road vs Track (beagle_senior)

Wed, 28 Aug 2013 21:21:39 GMT

maybe just go down to a 215 front tyre??

Wheel Sizes / Offsets - Road vs Track (Treay81)

Wed, 28 Aug 2013 21:05:42 GMT

I know this may have been posted elsewhere specifically but I have conducted a search to no avail.

I recently purchased Shayno's Rosso MR2 GT Turbo Hardtop to fill the gap my N/A left when I sold it to 'Gatesys SW20'. But it has some work to be done to make it more enjoyable for use on trips and track. ( I need to use it to get to and from work til I get another work ute as this was how I justified it to the wife! haha. so thats a decent 600 odd k's each way)

it is fitted with 17X7.5 and 17X8.5 wheels (also has tein coil overs). front tyres (225 45 17) are scrubbing heaps on cornering and hard bumps, tyre shops seem to think theres no such thing as a 225 40 17 so I'm contemplating the option of keeping my eyes open for a set of 17X7 / 17X8 rims to fit but would like opinions on what set will give me the best balance between road going usability and agility vs doing some track work when the opportunity pops up and ties in with my work commitments...

so 7.5/8.5 or look for 7/8 combo?... appreciate your help.

Treay.