Fat bike cranks, an...
 

[Closed] Fat bike cranks, anything I should know?

Posts: 0
Free Member
Topic starter
 

My frame has a 135mm offset rear end, by 17.5mm, the same as a pugsley. Can I slap any old 100mm axled cranks on there or do I need to choose wisely?
So options mention the arm length and some other number i.e. 175/190 on a set of raceface rides. Was ist das?
Do enlighten me.


 
Posted : 31/10/2017 8:45 am
Posts: 0
Free Member
 

190 is the dropout spacing


 
Posted : 31/10/2017 8:54 am
Posts: 10654
Full Member
 

It’s a bloody minefield, but I’m really impressed by the e-Thirteen ones I put on the Puffin, with a Hope BB.


 
Posted : 31/10/2017 8:58 am
Posts: 12522
Full Member
 

Rear hub spacing.

I'd find low numbers for your same-as-a-Pugsley. I've got some slightly tatty but serviceable SRAM x5 cranks you can have for not much?

Came off a Puffin, 175mm crank length, 170mm hub, 100mm spindle.


 
Posted : 31/10/2017 8:59 am
Posts: 0
Free Member
 

ned
if takisawa isnt interested, how much do you want for your cranks? i stripped the drive side my current x5, so could do with a cheap set
thanks


 
Posted : 31/10/2017 10:00 am
Posts: 12522
Full Member
 

Do you need 2x, or 1x, Lester?


 
Posted : 31/10/2017 10:08 am
Posts: 0
Free Member
Topic starter
 

Interesting, so hopefully with my skinny ass back end I needn't worry about the extra guff and can just run the fat cranks of my choice.
May I have a picture of these cranks? Could be interested!


 
Posted : 31/10/2017 10:13 am
Posts: 12522
Full Member
 

Will take some tonight and send to you both. They came on a bike I bought s/h and they've had the inner ring bolts ground off. Nothing wrong with them (unless you want to run a double!), but my knees prefer a 170mm crank.


 
Posted : 31/10/2017 10:48 am
Posts: 0
Free Member
 

1 x is what im running , no pictures just a price please:-)


 
Posted : 31/10/2017 11:00 am
Posts: 12522
Full Member
 

£35 posted 1st class?

Or can handover and save the ballache if you're in London any time soon?


 
Posted : 31/10/2017 12:57 pm
Posts: 12522
Full Member
 

goodlemon, it's to make sure the crank arms are wide enough to clear the stays. wider hub needs wider stays which need wider spaced cranks. But it's advisable to have cranks no wider than necessary, for the sake of your knees and your pedal/ground clearance in corners.


 
Posted : 31/10/2017 1:00 pm
Posts: 0
Free Member
Topic starter
 

Noted.
Thanks 🙂


 
Posted : 31/10/2017 2:25 pm
Posts: 1870
Full Member
 

Just went through same minefield buying cranks for my Pugsley.
Go for cranks listed for 170mm rear end. They are the ones that work with 4" tyres.
190mm spacing tends to be for 5" tyres and wider frame clearance. Cranks for this may work but you won't get a great chainline.


 
Posted : 31/10/2017 2:57 pm
Posts: 41786
Free Member
 

190mm spacing tends to be for 5" tyres and wider frame clearance. Cranks for this may work but you won't get a great chainline.

You can clear 4.8" tyres on <80mm rims with normal '170' cranks and 1x, plenty of people on the O-One fatty facebook group run that combination.


 
Posted : 31/10/2017 3:01 pm
Posts: 1870
Full Member
 

On one fatty is 170mm hub though is it not?
And I did say "tends to be" 😉


 
Posted : 31/10/2017 6:22 pm