SLROC Forum

Can anyone tell me what the correct factory wheel/ tyre size for the above landy? It currenty has 16" rims with 235/70/16 tyres, which i assume are correct, by but my speedo seems to be reading a wee bit faster that the speed it feels like driving. Its a 300 tdi, and dont think the box has been changed. is there a ratio differnce between gearboxes on the 200 tdi engine and 300 tdi engines which may affect this?

Can anyone tell me what the correct factory wheel/ tyre size for the above landy? It currenty has 16" rims with 235/70/16 tyres, which i assume are correct, by but my speedo seems to be reading a wee bit faster that the speed it feels like driving. Its a 300 tdi, and dont think the box has been changed. is there a ratio differnce between gearboxes on the 200 tdi engine and 300 tdi engines which may affect this?

Depends on age. An older vehicle might have started on 7.50 R16 - Avon Rangemaster normally.  The 235s should be pretty close to "normal" but they vary in size according to manufacturer.  Try checking your speedo against a GPS ?

I swapped the knackered 7.5 R16 Michelin something or others for Goodyear MTR 235/85R16's the speedo seemed to under-read by about the same amount, give or take 5mph but perfectly fine for passing an MOT

Just spotted the 70 bit - I think its 235/85/16 thats the 7.50 equivalent. Running 235/70r16 will have a rolling diameter nearly 20cm less than the bigger size and give you a difference on the speedo of 8.7% according to :

http://www.kouki.co.uk/utilities/visual-tyre-size-calculator

G.

My 110 runs on Boost Alloys ( the standard LR wheels) and it has 235/85/16.

Thanks guys - appreciate all your replies!