Bicycle Mechanics - Spoke Length

I am going on a tour next week and need to bring a few spare spoke on my trip. I built my wheels on my bike, but now for thee life of me, I cannot find the spoke lengths I wrote down.

I have looked at 2 different spoke length calculators online and just cannot figure it all out anymore.

If someone could help that would be great.

Front Rim: Mavic XM 317 Disc
Front Hub: Shimano Deore XT HB M756

Rear Rim: Mavic XM 317 Disc
Rear Hub: Shimano Deore XT FH M756

Spoke Pattern: 3 cross

Any help on spoke lengths would be great. Thanks

Take one of each size off the wheels and measure them. At least that will tell you how long they are now.

Take one of each size off the wheels and measure them. At least that will tell you how long they are now.

The wheel is perfectly trued and tensioned at this point and taking spokes out is the last thing I wanted to do. Any other ideas? Help with spoke calculator.

I wouldn't fool with a trusted aligned wheel, it's bad karma if nothing else.

You can measure your existing spokes easily enough if you're willing to remove a tire.

Place something across the flanges of the rim above a nipple, measure the drop to the top of the nipple. Now measure along a spoke from the hub to the outside of the rim, subtract the drop and you're home. Note, that spokes are sized from inside of the elbow to the end so measure correctly, and you should deduct 1mm so the spoke comes up slightly short of the top of the nipple.

I wouldn't fool with a trusted aligned wheel, it's bad karma if nothing else.

You can measure your existing spokes easily enough if you're willing to remove a tire.

Place something across the flanges of the rim above a nipple, measure the drop to the top of the nipple. Now measure along a spoke from the hub to the outside of the rim, subtract the drop and you're home. Note, that spokes are sized from inside of the elbow to the end so measure correctly, and you should deduct 1mm so the spoke comes up slightly short of the top of the nipple.

Will do. Thanks

Everything is in my spreadsheet:

http://www.mrrabbit.net/wheelsbyflemingapplications.php


Just look up the rim ERD....follow the instructions in the calculation tab....take the results and round 'em down to nearest 1/2 mm if needed.

=8-)

How many spokes?