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27.5 tyres on 29er frame


Puncture Kid

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Posted

Got a question. My mate bought a Trek from Sportsmans late last year.  I just noiticed that the wheels on it are 650B but the tyres are 29er.  They inflate fine (tube) but everytime he does a big jump he busts a tube.  I pointed that out to him but he seems to think thats the right setup.  Am i being daft can you run 29 tyres on a 650b rim?  I would think that's why he is popping/pinching so many tubes.

He should take them back right?

Posted

Got a question. My mate bought a Trek from Sportsmans late last year.  I just noiticed that the wheels on it are 650B but the tyres are 29er.  They inflate fine (tube) but everytime he does a big jump he busts a tube.  I pointed that out to him but he seems to think thats the right setup.  Am i being daft can you run 29 tyres on a 650b rim?  I would think that's why he is popping/pinching so many tubes.

He should take them back right?

Are you serious?

Posted

Will it even fit?

There is a size difference of 1.5" (that is 37.5mm) The tyre will be way to big for the rim to even remotely seat.

 

Or am I being completely daft here?

Posted

Are you serious?

 

 

Will it even fit?

There is a size difference of 1.5" (that is 37.5mm) The tyre will be way to big for the rim to even remotely seat.

 

Or am I being completely daft here?

 

 

May he's referring to a tube?

Posted

Yeah i was actually surprised that the tyre fits around the rim without being all loose but it does.  Maybe cause he is over inflating the tube.

 

If that is the case, no wonder he's "popping / pinching" so many tubes.

 

AND THAT KIDS, CONCLUDES TODAYS LESSON OF WHY YOU NEVER BUY A GAME/MAKRO/SPORTSMANS SPECIAL!!!

Posted

Got a question. My mate bought a Trek from Sportsmans late last year.  I just noiticed that the wheels on it are 650B but the tyres are 29er.  They inflate fine (tube) but everytime he does a big jump he busts a tube.  I pointed that out to him but he seems to think thats the right setup.  Am i being daft can you run 29 tyres on a 650b rim?  I would think that's why he is popping/pinching so many tubes.

He should take them back right?

 

Please post a pic of the 29er tyre on 650B rim?

Posted

I am surprised the tyre sidewalls are still inside the rim?????????

 

I would like photo evidence....

 

I would be surprised that while riding the whole tyre and tube does not come off the rim completely and he ends up on the rim...

 

The craziest SH I have ever heard off OMG!!! :eek:

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