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182 track day wheel size - are 15s or 16s better?

  Merc E class
Does anyone have any experience of which is best on 182s, 15 or 16 inch wheels for track days? My 182 came with 16s road wheels , but a lot of track cars seem to use 15s? Anyone have any views on this?

Coops Mk1

ClioSport Club Member
  Lots of Scrap...
But most people fit 2118's, which weigh more than a small elephant 🤣
I had 16" Rota R Spec on my R53, 6.5kgs each vs 15" 2118's at 9kgs iirc.
Most people fit 15's as the tyres are cheaper imho.

Only the scene idiots, clever people like me run superleggeras at 4.9kg a corner


ClioSport Club Member
  Bean 182 + E70 X5
Only the scene idiots, clever people like me run superleggeras at 4.9kg a corner



ClioSport Moderator
  Whichever has fuel
I use 15’s because track tyres are almost half the price of the same in 16’s.


ClioSport Club Member
Weight between 16s and 15s is minimal, 16s will be heaver but the tyres on 15s will also be heaver due to the increased tyre wall. The circular circumstance between the two is also minimal again due to the increase tyre wall on the 15s.
15s tyres are much cheaper that's about it IMO.

Coops Mk1

ClioSport Club Member
  Lots of Scrap...
Depends how clever you are, my old setup with 15" superleggeras and Dunlop slicks was 10.8kg per corner, most 16" wheels come in at nearly 9kg..... Just saying


ClioSport Club Member
  Clio 182 Cup/Meg R26
For out and out grip you can get wider tyres with the same rolling radius

I thought width was same for both 15 and 16 195 or 205 whatever your preference. I find the car just feels better on 15s plus the seriously cheaper tyres over 16s. And personal for me I think 15s looks better. No technical answer from me which is best its a personal preference.
Pic of mine on coilovers and 15s. Think 16 would rub

Ph1 Tom

ClioSport Club Member
Width the right offset, and maybe a little bit of trimming. You could do 225/45/15 or 215/45/16.

Also with track tyres the tyre can be wider than the advertised profile and varies between manufacturers.
  Clio 172 Cup
I use 15's on my sprint car. IMO 15's have the following advantages:

Based on Team dynamics pro-race 1.2 fitted with Nankang AR-1 tyres

(wheel only): 15x7= 6.2kg, 16x7 =7.4kg therefore lower unspring weight when using equivalent size tyres
Lower overall weight = easier for the engine to spin the wheel up, easier for the brakes to slow the wheel down
Cost: 4 x 15x7 wheels = £436.80, 4 x 16x7 wheels = £499.20 (PRS Racing)
Tyre cost: Nankang 195/50/15 = £105.00, Nankang 195/50/16 = £147.00 (Demon Tweeks)
Rolling radius: Nankang 195/50/15 circumference = 1812.7mm, Nankang 195/50/16 circumference = 1891.2mm
Smaller circumference = better acceleration but lower top speed
Nankang technical data confirms that the section width for 195/50/15 and 195/50/16 is identical (201mm), therefore depending on what tyre pressure is used, the contact patch of either size tyre will be equivalent, meaning no loss in grip using the smaller tyre.

One negative is, if you drive your car to whatever events you do, then the reduced gearing of the smaller wheel/tyre combination means your engine rpms will be higher at motorway speeds.

A loud stereo....................or earplugs, are recommended


ClioSport Club Member
My 182 is track only & I run 15’s, I buy second hand tyres that have hardly been used cheap as chips, been using full slicks this summer which came from a chap who runs in the mini challenge race series £120 for a set of 4 that have done 1 race, once you get them hot the grip is unbelievable.