- Joined
- Mar 21, 2018
- Threads
- 43
- Messages
- 1,778
- Reaction score
- 2,433
- Location
- planet earth
- Vehicle(s)
- '13 lambo lp550-2, '18 honda ctr cw (r-12321), 14' porsche cayman s, '16 porsche macan s, '13 mini jcw nme stage 1, '15 audi s3 apr stage 2, '15 audi q3, '12 monster 1100 evo, '16 triumph thruxton r, deposited for '19 lambo huracan performante
- Vehicle Showcase
- 2
- Banned
- #346
i went back and checked the calculations. 255/35/19 will be fine for your speedo and only 1% off on speedo which is negligible vs. 245/35/19 i'm running which is 0.1% off on speedo as comparo. you're fine there and no there is no way to correct the speedo.Appreciate the detailed response. Would a 255 have noticeably more grip in the dry/be more sketchy in the wet than the stock 245 or not so much? Also, may be a dumb question but with the speedo being digital is there no way to apply a correction factor?
as for "grip in dry", are you referring to forward/longitudinal or lateral grip? what are you looking for when you say "grip"? wider front tires reduces understeer at low speed and quicker turn in due to greater slip angles thus more lateral/cornering grip. if rear is also increased to 255 then it sort of neutralizes the gains from the front and brings you back similar to stock behavior so fine there. if you go 255 front and 245 rear then greater turn in with some induced oversteer effect.
on street it reduces gas mileage just a tad. 255 has a little bigger contact patch than 245 thus less pressure (psi) on the contact patch (same total car weight on larger surface area) thus on wet is a little more skittish than 245's contact patch but shouldn't be something to worry about as long as tread pattern moves water good enough.
if you're looking for forward grip on launches from a stop, yes, you'll get a little bit more grip. just something i've never really been concerned with in a fwd car. grip while moving or in corners are what i personally look for but just me.
Sponsored