Short Crank Database

Hi.
Today I'm going to talk about short cranks.

There are lots of reasons why folks want shorter-than-normal cranks.

• some folks are petite - the 5 ft rider has shorter legs than the 6 ft rider!
• some folks ride TT, and shorter cranks allow a more aero position
• some folks have injuries - longer cranks result in a more acture knee angle

How short is short?
Just about every makers covers 170-175mm.
A great many cover 165mm cranks, too.
So I'm going to concentrate here on cranks of 160mm length or less
(btw, I'm currently running a 152mm crankset on my bike, even though I am 6 feet 3 inches tall!)

So on with the database:

Maker/Vendor        Length     Price ($)     BB     BCD                          Notes
Zinn Cycles
JK MTB                 160mm    325            ISIS    104/64 triple 4-bolt   
(the website says more cranks are available, right down to 130mm, but they are not listed/selectable in the drop-down menus!)

Cobb Cycling
Crankset                 160mm    299            many    110 double 5-bolt    50/34 inc. 771g
Crankset                 155mm    299            many    110 double 5-bolt    50/34 inc. 771g
Crankset                 145mm    299            many    110 double 5-bolt    50/34 inc. 771g

SJS Cycles
Thorn (double drilled)
                    140mm+115mm 104       sq. taper    110/74 triple 5 bolt   "child use" - no heavy riders!
Thorn                      145mm      91       sq. taper    110/74 triple 5 bolt
Thorn                      140mm      91       sq. taper    110/74 triple 5 bolt
Thorn                      160mm      65       sq. taper    104/64 triple 4 bolt
Thorn                      155mm      65       sq. taper    104/64 triple 4 bolt
Thorn                      150mm      65       sq. taper    104/64 triple 4 bolt  565g
Crank Shortener                        85       adapter to fit over cranks          

Spa Cycles
Sronglight Impact S
(two chainguard)     160mm      83       sq. taper                                     includes chainring
(one chainguard)     160mm      66       sq. taper                                     includes chainring
Impact triple            160mm      78       sq. taper    110/74 triple 5 bolt  includes chainrings (various)
Impact Kid              155mm      55       sq. taper    double 5 bolt            includes chainrings (various)
Impact Kid              150mm      55       sq. taper    double 5 bolt            includes chainrings (various)
Impact Kid              145mm      55       sq. taper    double 5 bolt            includes chainrings (various)
Impact Kid              130mm      55       sq. taper    double 5 bolt            includes chainrings (various)
XD-2                       160mm      46       sq. taper    110/74 triple 5 bolt  includes chainrings (48/38/28)
XD-2                       160mm      26       sq. taper    110/74 triple 5 bolt  just cranks and spider, 510g

Dutch Bike Bits
Allight                      155mm     48      sq. taper    130/? triple 5 bolt  
Allight                      155mm     37       sq. taper    130 double 5 bolt  


Update: I have been using the 145mm Stronglight Impact Kid cranks sold by Spa Cycles.

The 145mm cranks in use - here on a 75 km (47 mile) touring ride.
https://www.strava.com/activities/2235165681