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Why Shorter Cranks? - PART 2 - GreshFit Bike Fitting

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Shorter cranks for riders 5’6” and ABOVE can be very beneficial. Your bike likely has one of the following:
170
172.5
175
My very general recommendation is:
175 users - try 170 if curious or 165 if injured
170 and 172.5 users - go with 165 if curious or 160 if injured
My video on Stability and Balance: • Balance and Stability ...
Crank length part 1: • Why Shorter Cranks? - ...
My custom Seven Cycles bike with Appleman 165 cranks: • My Custom Seven Cycles...
For nerds: Sheldon Brown's take on crank length: www.sheldonbro...
For nerds: Gain Ratios via Sheldon Brown: www.sheldonbro...
160mm WITH rings Shimano crank for 10/11 speed bikes: part # IFCR7000MX04L
160mm WITHOUT rings Shimano for 10/11 speed bikes: part # IFCR7000MXXL
Appleman cranks (premium option, not compatible with Hollowtech II BBs): www.applemanbi...

Опубликовано:

24 авг 2024

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Комментарии : 36

@jblocker6613 8 месяцев назад

Years ago I bought a Trek 62cm road bike that amazingly had 170mm cranks on it. I’m guessing it was a factory mistake but it worked really well for me. Years later after selling that bike for a xl frame Giant Defy I never felt like my peddling was quite as smooth and fast as my Trek was. I decided I’m going to switch out the 175’s for 170’s. I think the reason why shorter cranks work for me is because my lower part of my legs are long compared to the upper part of my legs. I have a 35.5” inseam, btw. I think it helps round out my peddle stroke better. Thanks for sharing this information, nice video!

@greshfit 8 месяцев назад

Very cool! Thanks for sharing - I’m glad those 170s snuck their way in!

@al_peko 6 месяцев назад

that's right. crank length depends no only your height and inseam length, but also on the ratio of the length of the thigh and the length of the shin

@phil_d 9 месяцев назад

I'm 5'4" (163cm) and ride 155mm (Rotor, 24mm and 30mm universal options) and 160mm (Shimano R7100 12sp on an 11sp setup) cranks on my bike. I have limited range of motion with my left knee (poor form on 140kg squats) and shorter cranks have been a lifesaver for me. I like the benefit of being able to spin, especially on sprints (130rpm). Just a point to note, you may need to increase your gearing due to shortened lever arm. With Rotor, you can buy their 1-piece double chainring from 46/30 and up. For Shimano, consider a bigger cassette.

@theisrandersen 9 месяцев назад

I'm 193cm and changed to from 175 to 185mm. Best upgrade I've ever done.

@greshfit 9 месяцев назад

Congratulations

@al_peko 6 месяцев назад

what is your cranks brand/model of 185mm? for road bikes I saw only 180,mm maximum

@Pompdiepom 9 месяцев назад

After years of fiddling around with wedges due to knee pain I recently discovered that with 165 mm cranks ( & solestar insoles / neutral cleats placement maxed out towards the heel ) everything was ok again. This is totally overlooked, and I agree that 172.5 and 170 is the same. Pretty silly actually how people from 160cm to 200cm body length are now being sold a bike with 170/175 cranks. Handlebar width is another overlooked issue , 42cm is too wide for a lot of people.

@greshfit 9 месяцев назад

💯

@Etk333 20 дней назад

5'11 and 170 feels amazing for me but since I prefer the clearance cause I run a track bike I stay with 165

@basvanleeuwen4502 9 месяцев назад

I am 1,97 but after continuing kneeboains I just switched from 175 to 170

@mariconor242 8 месяцев назад

Bike fit first, this is the correct answer. Personally I run 165mm on two bikes and I'm 177cm. I have no issues riding my son's bike with 172.5mm cranks and have found there's no difference in power output.

@madzonic16 9 месяцев назад

I'm 5'7" (170 cm) and will go from 165 to a 145mm cranks

@sccxvelo 9 месяцев назад

Thinking of going to shorter cranks on my CX/ gravel/ everyday bike. Tall person on size 58/ 60 or XL frames currently have 175mm so on the fence about it as bike part money needs to go else where for new fork, as stem with angled up 6-8 degrees stem on the very top of fork and cannot lower it or it will be a bad fit. Then longer cage on the RD for bigger cogs in back on 1x set with no FD cable routing. Tough call what to do first.

@andreashertig1869 9 месяцев назад

I am 192cm and ride 175mm cranks. I got knee and hip/lower back issues but only on one side. should I try a shorter crank anyway?

@greshfit 9 месяцев назад

It wouldn’t hurt. If you have issues on one side then I’d highly recommend getting checked out by a direct-observation bike fitter

@johnnyboy4711 3 месяца назад

Hi I am 179cm height with 91kgs, went from 170mm to 165mm on TT bike. Trying to tweak the fit (saddle height from bb and fore/aft from bars etc)from 170mm bikefit. Should the saddle rise by the same difference? 5mm

@greshfit 3 месяца назад

That’s right - with 165s raise your saddle 5mm.

@juicytones 7 месяцев назад

When going from longer to shorter length cranks should the saddle height and set back be 1 to 1? Example: going from 172.5 to 165 should I raise saddle 7.5mm and set it back 7.5 mm?

@greshfit 7 месяцев назад

No What I generally recommend is, don’t move fore aft - keep as is. Instead simply raise saddle 50% of the crank length difference, and give that a go. Good luck !

@juicytones 7 месяцев назад

@@greshfit awesome thanks for the tips