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170mm vs 175mm MTB crank


Furbz

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Posted

what are your thoughts regarding crank length on a MTB bike?

 

i am buying a new bike.

inseam is 80cm, and i'm 170cm tall.

 

the 2 bikes on the floor are kitted with 170mm and 175mm

 

now i am tempted to go for the 170mm but need some wisdom from fellow hubbers!

 

Thoughts, opinions?

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Posted

what are your thoughts regarding crank length on a MTB bike?

 

i am buying a new bike.

inseam is 80cm, and i'm 170cm tall.

 

the 2 bikes on the floor are kitted with 170mm and 175mm

 

now i am tempted to go for the 170mm but need some wisdom from fellow hubbers!

 

Thoughts, opinions?

 

 

doesn't really matter.

 

170mm will help you product cadence so for a road bike that will be ok. The 175mm will help you produce more torque which helps for MTB.

 

My inseeam is 81.5 and overall 171 and I ride 172.5 on the road and 175 on the MTB

Posted

Disagree, 170mm gives better obstacle (read, rock) clearance and is better suited to a shorter leg length. Shorter crank is easier to accelerate from a standstill.

Posted

Greater torque, but slower acceleration. The reason track sprinters ride short (165mm) cranks.

 

Because they ride cadence up to almost 200rpm.

 

Not so much on a MTB

Posted

170, better for MTB, in my opinion. Especially if you're short.

Hell, I'm short and ride 170's on road, MTB and track, so I suppose I'm biased

Posted

Better clearance yes, BUT

Longer lever (175mm) = greater torque for low speed high torque situations

You can always gear down if required. 170 all the way. The OP will thank us later.
Posted

this thread was suppose to help him decide :mellow:

 

It's helping a lot actually!

 

All my previous mtbs I bought 2nd hand. This is my first new purchase so I get to customize everything which is nice!

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