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Road Chainring on MTB?


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Is it possible to put a bigger outer chainring on a MTB to keep up with the roadbikes on the road?

Or must you put on a whole new crankset.

If so, do you need to change the chain or move the derailleur up?

I just want to do this every now and again to do road races with my MTB.

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To answer your topic title, No, road chainrings wont fit on a mtb crank.

 

Road chainrings have a BCD of 110mm or 130mm and mtb a BCD of 104mm

 

You can get a bigger chainring ... or a roadbike!

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I have Shimano SLX 10spd on.

I can't find a bigger chainring for SLX anywhere (don't think they make it).

Is it possible to put on a 48tooth on the outer? I see they sell a 48 tooth, but stated it's for 9 speed.

Will it be just as simple as putting it on and everythings fine without adjusting anything else?

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Get a tripple road crank and you will have the best of both worlds ;)

 

30X39X50

 

http://www.chainreactioncycles.com/Images/Models/Original/11791.jpg

Edited by gummibear
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I used to run a 105 triple crank on my Cannondale MTB in the old days. Did a few Argus and 94.7's like that. Certainly helped. The look on the faces of the roadies as you pedalled next to them with your knobblies humming at 55kph sitting upright was priceless... Used it off road no problem. The occasional tree stump knocked the bigger blade, but it was no issue.

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hi there,

buy yourself a 2nd crank ( deore ) which has a 48 - 36 - 24 chainrings on it . fit it to your bike and adjust the front derailer to run as close as possible to the larger rings as possible .then you just need to change cranks to suit where your cycling . You mite need to use a 2nd speedlink and one link of chain with the larger chainrings

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I think it is too much hassel to change the crank and reset the derailleur each time you want to ride on the road. Either as suggested try the 48/36/24 mtb crank as a permanent fix or add a cheap second hand hybrid to your stable. You can pick one up for the cost of a crank. Also remember that the cost of chain rings, especially on the cheaper cranks, almost equates to the cost of a new crank.

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