jerelskii

Hey im building a new fixie, ive been riding for about a year but never built one from the ground up. Im comfortable with putting all the components together but im stuck on one thing. The bottom bracket and crankset. I know ill be using a 68x107mm jis square tapered bottom bracket but the problem is im not sure what cranks i can and cannot use.
Heres the bottom brackets that i will be using, they are the same size but which is better?:

https://www.cyclingcloseouts.com/Prod...315010284.aspx


https://www.cyclingcloseouts.com/Prod...B__CR5366.aspx


Considering the size of the bottom bracket can i use any of these cranks?:

https://cgi.ebay.com/SHUN-Track-Fixie...item230d2edfc4

https://cgi.ebay.com/TEC9-FIXED-GEAR-...item1e61b2f358

https://cgi.ebay.com/New-DRIVELINE-Tr...item27b8fd9f0e

TejanoTrackie 

You are going about this the wrong way. This is the proper order:

1) Choose the crankset you like / want. Assuming it is square taper,

2) Determine the BB spindle length and type (JIS or ISO)

3) Choose a BB that meets the requirements of step 2.

Retem

why not just get the eighth inch cranks or any of the orign8/andel style should work

thedutchtouch

lemme guess, trying to reuse a shimano UN54?

per sheldon (https://www.sheldonbrown.com/bbtaper.html):
J.I.S.


J.I.S. is the Japanese Industrial Standard, and is generally used on square taper cranks made in Asia. J.I.S. spindles are shorter and blunter, they don't taper down to quite as small a square. J.I.S. models include:

• Ritchey
• S.R. Sakae Ringyo
• Shimano
• Specialized
• Sugino (except N.J.S. track models IE SUGINO 75 and some older units.)

TejanoTrackie 

107mm is too short for Andel, which requires at least 110mm. If you believe the info in the eBay listings, the first and third cranksets require a 103mm spindle. It does not appear that the OP has purchased anything yet.

Bianchigirll 

I agree with Tejano you are sort of putting the cart before the horse.

however if you are deadset on a 107 BB spindle, just how did you decide on that? I would recomend getting the 1/8" BB and Crank set. they are designed to work together and that should help prevent problems down the road. (OH sorry no pun intended)

https://www.cyclingcloseouts.com/Prod...315010284.aspx


https://www.cyclingcloseouts.com/Prod..._Crankset.aspx

Scrodzilla

Actually, through experience I've found that a 107mm will only give a straight chainline with those EighthInch cranks if the chainring is on the inside. To run it on the outside (as pictured), you need a 103mm spindle.

Retem

I have used the andels with 107mm and gotten a good chainline most 110mm bbs are the same length as a 107mm on the drive side and longer on the none drive side

jerelskii

Thats makes sense..So youre saying that the length of the bottom bracket doesnt matter? As long as the frame can fit any 68mm english bottom bracket, the length can be 103 or 107 etc..?

Squirrelli

No...they've been saying that bottom bracket is totally dependant on the crankset. For the EighthInch cranks, length can be either 103mm or 107mm because you can mount the chainring on the outside and inside of the crank spider.



With that said, if you want to use that EighthInch crankset, a 103mm bottom bracket will allow you to put your chainring on the outer side of the spider and 107mm will allow you to put the chainring on the inner side.

jerelskii

oohhhh okay, now i get it! thanks for the clarification squirrelli hahaha..
And thanks to everyone who replied! Ill let you guys know how my project is going.
Sorry i just never built one before..

striknein

Depending on the bottom bracket, it may also be possible to replace the spindle with another of an appropriate size.

Retem

thanks for elaborating squirelli
my pint was that there are certain bb spindle lengths that interchange quite easily
but the jump from 107 to 103 is large as the nut chaser has stated