- Crank length
Will I notice a big difference changing from 175 to 165mm?
I’ve got a low BB on my frame and as my timimg is crap I keep smacking my pedals. I’m thinking this might help a bit.Posted 8 years ago
175 to 165 will be pretty obvious
175 to 170 less so, but will still improve your ground clearance, and it’s surprising the difference 5mm will make.Posted 8 years ago
I tried exactly that to also get a little more clearance but I didn’t like the (slightly) shorter stroke at all ! I’m only 5′ 6″ and always used to use 175’s when I raced just about EVERY week. Read later that I should REALLY use 170’s (which I switched to) then I read it should be 165’s but, as I said – didn’t suit. Now I’ve decided to go back to 175’s as they just felt right ! There are NO real rules in cycling – just personal preferences I guess…Posted 8 years ago
i did that to gain more clearance – they felt short and like i couldn’t get any power down.
i didn’t like it.Posted 8 years ago
Thanks guys – Anyone selling their shorter cranks so I can give it ago?Posted 8 years ago
I can only add – on bikes that are subject to pedal strikes – ever few mm here and there adds up to an important log / rock that you miss (and maybe saves you a trip to A+E).
So what worked for me:
– shorter cranks
– more fork and shock pressure (not ideal)
– thinking ahead
– bigger tyres (think rubber queens)
– loose weight
– get a new frame
Ok – I never got as far as the last 2.
In answer to your opening Q- yes you will probably notice it. It might be better or worse for pedalling depending on what you’re used to.Posted 8 years ago
I looking at this as well as increasing the fork length by 30mm so hopefully it will all make the bike better for me.Posted 8 years ago
If I go from my hardtail 170 cranks to my rigid 165 cranks and haven’t ridden it for a while I notice the difference. The other way round I don’t. My previous bike had 175 cranks which I found fine off road but if I rode for a few miles on the road where I wasn’t moving around on the bike then my knees didn’t like it. Given the choice I’d probably stick with 165 as I prefer to spin rather than grind but the choices in 165 are limited.Posted 8 years ago
I use 170mm cranks (previously used 175mm) – probably in my head but I tend to spin a fairly high cadence and they seem to suit that.
Not sure about reduced power, I think that’s just my legs 🙄Posted 8 years ago
I swapped to 170mm (from 175) on one of my bikes purely to avoid pedal strikes. It worked brilliantly and I really don’t notice the difference when pedalling.Posted 8 years ago
Use 175s, 170s and 165s on three different bikes. 165s are very short and noticeably harder to turn compared to 175s but clearance is immense.
170s on a HT are a reasonable compromise but still harder work than 175s.Posted 8 years ago
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