Mountain Biking - Wide Tires on Narrow Rims

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doco
06-19-09, 04:41 PM
Anyone running wide tires with narrow rims ? Any problems ?

I just got a set of 26 x 2.25 tires and want to put them on a mavic xc 717 rims, 17mm wide and in the specs for the rims it say recommended tire width 1.0 to 2.1 tire size

I was running a set of tires 2.0 no problems

I know I need a wider rim, but no funds to buy a new wheelset

So, can I just lower the pressure on the tires? Is there any possibility of these tires blowing off the rims? or any other problems?

thanks

bikinfool
06-19-09, 05:50 PM
Use similar rims (X317, X517s) with various tires from 2.25 to 2.4 (various WTBs, Schwalbe Fat Alberts) with no problem, can't run 'em too low without getting a tad squirrely in hard turns, though I run 25-33 range usually. I also use wider rims (321s) for a bit more stability for some 2.5s...
doco
06-19-09, 06:09 PM
hey thanks, good to know I can save some $

I got the Shwalbe Fat Alberts, also..looks like an awesome tire

I was going to start at around 45 and see what happens

sirtigersalot
06-19-09, 06:27 PM
i'm not advocating it, but I somtimes run a 2.5 on an xc rim (one day i'll have the right rim) and on my cx bike that i just converted to flatbars and put the panaracer cross tires on which are a 45c, and measure out to a 29x 1.9 mounted on open pro rims... prolly not advisable, but i've had no problems

I wouldn't sweat a 2.2 maybe stear clear of a 2.35 or a 2.5
bikinfool
06-19-09, 06:31 PM
hey thanks, good to know I can save some $

I got the Shwalbe Fat Alberts, also..looks like an awesome tire

I was going to start at around 45 and see what happens

Run the Schwalbes around 30 myself. It's at 25 (or below if I'm lazy before a ride) that I can feel much difference...