I'm spending 2 or
3 times as much time at the computer as in the workshop. Now that more
people are interested in short cranks, I have to
reduce the time spent getting the information needed to determine the best solution for each person's needs.
times I've spent hours determining and pricing
out various solutions to a cyclist's problems and typing up their
options. Only to read in their 3rd or 4th email "Oh, I forgot to
cranks are for a child, please read Crank lengths for Kids
If you are
not in the USA, please read International sales and shipping
If you have
Range of Motion limits, please read
Cranks for RoM
If you have
a tandem, please read
Cranks for Stokers
If you have short legs, or are concerned that you will lose power with short cranks, please read Crank Length, Leg Length and Power and Short Rider Feedback.
When emailing me,
please include answers to any of the following questions
apply to your situation.
And please include
the word "crank", "cranks" or
"crankset" somewhere in your
Or have the
appropriate answers ready if you phone me @ 612-710-9593
- I'm a slow,
arthritic typist. So I don't want to waste time explaining
the basics to the experienced or confusing newbies with BCD, BB86 etc.
So, on a scale of 1 to 10, with 1 being "What's a Bottom Bracket?" and
10 being "Local bike shops consult me when they are stumped." where are you on the bike mechanic
- Why are you
interested in short cranks?
tall are you? AND/OR What is your inseam?
Inseam is much more useful than height for optimizing crank length.
For the inseam (pubic bone height), wearing socks or barefooted, stand
against a wall with your feet roughly 4” (10 centimeters) apart. Have a
friend place a thin, hard-covered book between your legs and against
the wall then, keeping one edge of the book firmly against the wall,
slide it upward until it's pressing against the pubic bone. Push the
book up hard enough to insure it's against the pubic bone. Measure the
distance from the top edge of the book to the floor. Do this a few
times. The longest measurement is the one you want.
- Any hip,
knee, leg length, range of motion or other
- How will
they be used? (Cruising,
touring, triathlon etc.)
you are a triathelete - Were you previously a cyclist or a runner? What
average speed do you aim for? What is your pedaling cadence? Running
cadence? How long are your current cranks?
- What sort of terrain do you ride in? Hilly, rolling, flat, mountains etc.
- What is your average speed?
- Have you
been to my website and if so, do
you have a specific crank in mind?
- What bike
they go on? Please be as specific as possible
- make, model, year.
you have a link to it on a website? (If, for instance, the website
shows a triple crank but your
bike has a double, please let me know.)
- What size is your rear wheel? (Or front wheel if you have a CruzBike or similar.)
- What type
of bottom bracket shell does your frame have? If you
don't know, I may be able to find
out, if I know exactly what
bike you have.
have a standard 68mm wide, "English" threaded (1.37" x 24 tpi) BB, then
shortenable crank will fit. Otherwise it can get complicated because
there are so many old and new "Standards";
73mm English threaded,
French threaded, Italian threaded, Trek BB90/95, BB86/92,
Specialized OS, BB30, PF30, BBRight Press Fit & BBRight Direct Fit,
to name a
you want to use your current chainrings, what BCD (Bolt Circle Diameter) are they? Or, what
cranks do you have now?
- If you want to
your bottom bracket, what type and how long is it?
you have a crank length in mind? If so, how did you come up with
chainrings and what size rings do you want? Is your low gear low
enough? Do you get much use out of your highest gear? If your cranks
are too long, short cranks will free up your spin.
( If you need
help determining what you need, please phone me.)
shifter do you have for the front derailleur? Indexed or friction? I don't mean the
derailleur, I mean the bit you fiddle with to move the
derailleur. And "Ultegra" for example, doesn't tell me what type
of shifter as Ultegra shifters can be bar end (non-indexed) or
intgrated brake/shift levers (indexed)
many cogs in
the rear? Not how many teeth on them but how many, 7, 8, 9, 10 or 11?
(Questions 13 & 14 help me determine what spacing
you need between chainrings.)
me where you are, so I can
an S&H cost.
US State, not postal code.
may be only one setup to suit your needs. But if there are multiple
Are you looking for the cheapest possible?
Highest quality? Most cost effective?
do your own work or will you have it done at a shop? If you are
interested in learning, I sell the
tools needed to swap cranks and bottom brackets. Comprehensive instructions can be found here.