Crank arm lengths?

[keen]

 175mm seem like the most popular crank arm length? When is 180mm desirable? Pro's n con's? Thanx

[Carbon_Angus]

ifyou were tall and riding a single speed and wanted to really horse it around.

other~wise you'd be banging all kinds of stuff on the trail.

if you are curious try a 177.5, doesn't seem like much, but take it as a revolution and it's another gear, or two

i dunno what crank length track bikes have but i imagine they might have longer cranks

[smiley=beer.gif]

[Simon]

A bit of a simplistic answer but anythink helps.
go to http://www.middleburn.co.uk click on the technical link then click on the choosing crank arm length.
Simon [smiley=nod.gif]

[Thunderchild]

Has anyone who runs 175 length cranks ever tried 170s and noticed any difference?  

[Thunderchild]

Has anyone ever tried 170s who normally uses 175s and noticed a difference?  

[TCP]

My wife's rocky mountain came with 170mm Raceface cranks that have since migrated to her NRS.  She now has 175s on her Rocky mountain and I-drive and she switches between them without noticing a difference in function.  I think they may help with ground clearance on a bike with a low BB or big suspension. downhillers seem to use 170 or shorter.

[TCP]

My wife's rocky mountain came with 170mm Raceface cranks that have since migrated to her NRS.  She now has 175s on her Rocky mountain and I-drive and she switches between them without noticing a difference in function.  I think they may help with ground clearance on a bike with a low BB or big suspension. downhillers seem to use 170 or shorter.

[Carbon_Angus]

i rode on a set of 177.5's.....don't know if Hammer still has em, though...Mike

I did notice a difference, not much but yeah I did.

[Scott]

175 to 170 seemd it was easier to keep a fast/smooth spin

[Trail_Thumper]

Have you tried the Middleburn Crankset? I'm thinking about it.

[Simon]

Have you tried the Middleburn Crankset? I'm thinking about it.

I haven't tried the middleburn duo set but I've been running there RS7 3 ring set for the last 3 years only just today replaced the first chainring (middle),I've nothing but praise for there quality and reliability,over here I know the duo setup is very popular with XC racers including many top names,in a resent test they weighed in at 520g with rings and where praised for the surprisingly wide gear range,good ring life,interchangable splined spider system and quality,the only down side is some flex from the minimalist spider if you stamp on the pedals though you should be spinning the cranks anyway,I personally would consider these cranks if mine ever gave up on me,but there new RS8 3 ring crankset looks and sounds great and on test there was nothing negative said about them so after the experiance I've had with the RS7 set I'd probabaly go for them, also all middleburn cranksets and rings come in a range of colours,you can also choose either standard,slickshift,or slickshift/hardcote rings,hope this is of some help, Simon. [smiley=nod.gif]