Tyre size differences ?

Tyre size differences ?

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Discussion

ClassiChimi

Original Poster:

12,424 posts

150 months

Saturday 6th February 2016
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Could anyone confirm if a
245/40/17 rear tyre has a higher side wall than a
225/45/17 the 45 on the 225 suggests it's higher but I beg to differ,, is it a percentage of the tyre width,,
Can anyone lead me to a chart that I can check how these numbers are calculated. Cheers Al

ClassiChimi

Original Poster:

12,424 posts

150 months

Sunday 7th February 2016
quotequote all
Thanks guys, ive got it Sussed,,
As you say Anthony my bald old tyres are rather smaller than when they started out in life,, the Toyo's do seem more chunkie but their also on different rims so hard to tell really, I'll pull them off and line them up against the old Avons,,

Going by what I've got I would lik 245/45/17 and 215/45/17 to fill the Arch better and be a bit more compliant but the 40's in the Toyo are pretty spot on really.
I used to fret over the wheels filling the arch more but recently it doesn't concern me and as I'm running the car at a fairly high ride height it makes no odds. These new wheels I have are offset slightly more than my old wheels and that sort of makes them look more aggressive anyway,
I have to say the Toyo's suit the car far better than my old Avons,,although having such crap tyres was a huge buzz in a way, I'd long since worked out the braking distances and such with them,, the rears were so hard I could spin wheels on command upto about 90 mph,, felt like I had 400 hp,,, it's now faster but more planted,, I need more power scratchchin

ClassiChimi

Original Poster:

12,424 posts

150 months

Sunday 7th February 2016
quotequote all
thumbup yeah I've got that Anthony,, be interesting to see mine up,against Rich's car with the SP12' with a 20 mm off set. About the same track as the ones I'm now running by the looks of it,,, nice and wide smile

Edited to add, I'm sure mine are a 30 mm offset front and rears but my minds been elsewhere recently, I'll mail Andy who I got them from and check. I'm having the wheels off again to balance and play about with geo this week so I'll actually take a closer look at them.
The car handles better and less role,, I've also sriffenef up the shocks as the tyres offer better compliance, 22 psi all round,, nice smile

Edited by ClassiChimi on Sunday 7th February 14:54

ClassiChimi

Original Poster:

12,424 posts

150 months

Monday 8th February 2016
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Yep, I've got that Richard, My Bolshie period maybe biglaugh