February 13, 200719 yr Hi, Need new tyres and I'm wondering if I can use a 4.10 instead of a 4.00 on the rear of my MAR 250? I do mainly country road riding and a bit of green laning, so I'm looking for a tyre to suit and the tyre I'd like to use only comes in a 4.10! Thanks Andy
February 13, 200719 yr A 4.10 tire actually = a 3.50 size. It is measured across the outside radius vs actual width. It should still probaby fit.
February 14, 200719 yr If the 4.10 tyre you are thinking of is a MITAS, it will fit a standard MAR but will have very little side clearance to the chain guard. Diameter wise it is a better tyre than a 4.00 competition tyre for an MAR because the large OD of the 4.00 tyre causes OD clearance problems with the wheel at the forward end of the adjusting slots. The MITAS 4.10 is about 20mm smaller outside diameter than a Michelin XII 4.00
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