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Tyre Data

Some popular tyre sizes for your 109

Tyre size,
Load range
 

Rim width range
(inches)

 

Overall diameter
(inches)
Tread width Static Loaded radius Revs per mile
at 45mph
Maximum load(lbs) and inflation (psi)
31x10.50R15/C 7.0-9.0 30.8 8.5 14.1 675 2250@50
33x9.50R15/C 6.5-8.5 32.7 7.1 14.8 636 2510@50
235/85R16/E 6.0-7.0 32.2 7.1 14.8 646 3042@80
7.50R16/D 5.5-7.0 32.1 6.4 14.8 654 2440@65
215/85R16/D 5.5-7.0 30.6 6.4 14.2 678 3042@65
265/75R16/D 6.5-8.5 31.8 8.6 14.5 654 3335@65
Stock Discovery Size            
225/75/R16/D 6.0-7.0 29.4 7.2 13.5 707 2335@65
  • This list is biased towards the 109 because I've never owned an 88 and have no idea what modern tyre size is closest to the original 88 size.
  • This range of modern tyre sizes could be suited to a Land Rover 109 without rubbing on the chassis on full lock or putting the speedo too far out of whack. The data was taken from a popular manufacturers specification sheets and the dimensions quoted will be typical of most manufacturers tyres in these sizes.
  • Series IIA Land Rovers came with 6.00x16 on the 88, 7.50x16 on the 109 and 9.00x16 on the One Ton 109.
  • A stock 16 inch 109 rim is 5.5 inches wide and two of these sizes would suit stock rims.
  • A good rim choice for a 109 is the 7.0 inch wide steel Discovery rim. All of the 16 inch sizes above will fit. Many Disco owners ditch their steels in favour of after-market alloys and the rims can be bought from the owners or from tyre fitting places. If they come with good stock Disco rubber in 225/75/R16D, I suppose you could run them until they wear out but they are a little short and you will lose ground clearance and have a speedo which reads faster than true ground-speed.
  • Don't expect to pay peanuts for a Disco rim. Discovery owners aren't complete fools and know that their old rims are sought after by Series owners. But don't pay more than $A50.00 for a Disco rim without rubber in good order. Thats a fair price but if you see them for less, grab them.
  • In my opinion, the 235/85R16 mounted on a Discovery rim is the best general purpose choice for a 109.
  • Eight spoke steel 15 inch rims made to fit a Land Rover are a popular choice, especially among the wide sand-tyre set. The two 15 inch sizes above work well.
  • Be careful of alloy Range Rover rims. Most of them won't fit a Series because the Series hub drive flange is too bulky, not to mention the front hub lockers if you have them.
  • Be sure to check your local transport laws to ensure that your tyre and rim choice are legal.

I believe that the information above is accurate but assume no responsibilty if it is not.
I will welcome any comments on the above, suggestions or additional information that I can post here.
See e-mail bar below. I will of course gratefully give credit to anyone supplying further material.

This page last updated Wednesday, 17 February 1999 10:25

 

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