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-   -   Tire width fitment (https://www.bikeforums.net/bicycle-mechanics/1150306-tire-width-fitment.html)

mconlonx 07-20-18 10:28 AM

Tire width fitment
 
Guy asked me for advice, but it is beyond my knowledge base.

He's got a Kona gravel bike. Fork is advertised as taking tires up to 700x50. A friend of his says that it is equivalent of a 29 x 2.0 tire and that he should be able to fit such a tire to his gravel bike. I believe the bike originally came with 32 tires and he has no idea how wide the rim is.

Initially, I told him that fitting a 29 x 2.0 tire would depend on real diameter of the tire vs. how the tire mfg markets it, and knob profile. Also that just because it fits the fork, it might not fit the rear.

Any other advice that I missed and should let him know about?

Bill Kapaun 07-20-18 10:43 AM

1"=25.4mm, so a 2" would be about 51mm. Closer than "nominal" sizing.

I would expect the 50mm rating might be slightly conservative, not knowing how "aggressive" of a tire that will be used?

You might want him to dig out the ruler and measure where the least clearance is with his current tire and adjust from there.

If a friend has a similar tire mounted, temporarily swap wheels to check. He doesn't need to actually ride it.

mconlonx 07-20-18 11:31 AM


Originally Posted by Bill Kapaun (Post 20459402)
If a friend has a similar tire mounted, temporarily swap wheels to check. He doesn't need to actually ride it.

Good idea...

cannonride15 07-23-18 11:29 AM

Yep, 700x50 is the same as 29x2.0, isn't marketing great?


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