SRAM front drum brake hub

myke · #1 (**permalink**) 03-26-2009, 08:52 PM

Hello,

New to the forum and the hobby, I don't even have a bike yet, just a motor kit, planning to buy the Schwinn Jaguar at Target unless something else comes up by the weekend.

I picked up a SRAM front drum brake hub today at a schwinn dealer for $25. Now I am looking for rim's and spoke to assemble it for a new build. Is there some way to guess or figure out what length the spokes are I need to try and find?

Thanks for any tips or advise!

myke

ocscully · #2 (**permalink**) 03-26-2009, 09:03 PM

There are several spoke calulators available via the internet, http://sheldonbrown.com/rinard/spocalc.xls This is a link to a good one with a pretty extensive database of existing hub and rim measurements. You need to know exactly which rims you are going to use and the # of cross you want to use any of the calulators. Your local bike shop wheel builder should be able to run the #'s for you as well.

ocscully

myke · #3 (**permalink**) 03-26-2009, 09:21 PM

Thanks for the calculator! I will study it a bit more, but at first glance it would appear that this hub is not in that database, it says SRAM spectro on one side and it has a number 5004 engraved on the inside of the upright/anchor.

myke

eDJ · #4 (**permalink**) 03-26-2009, 09:53 PM

Glad to see this posted as I'm figuring I'll have to lace a 3 over 1 wheel with a drum brake
before long.

Anyone know of links to sources where drum brakes are sold on the net for about $25 ?

ocscully · #5 (**permalink**) 03-26-2009, 11:23 PM

Quote:

Originally Posted by myke

Thanks for the calculator! I will study it a bit more, but at first glance it would appear that this hub is not in that database, it says SRAM spectro on one side and it has a number 5004 engraved on the inside of the upright/anchor.

myke

I believe the Sram Hub is the old Sturmy Archer. The dimemsions that you need from the hub are the Flange Dia measured from ctoc of two spoke holes 180 degrees from each other, and the center to flange distance which on your front hub should be half the distance between the two flanges. If your hub is the same as the Sturmy the Flange dia should be 90mm and the center to flange should be 27mm.

ocscully

myke · #6 (**permalink**) 03-28-2009, 12:23 AM

Thank you very much for the detailed information! I will post back with the results when I am finished with the project.

myke

myke · #7 (**permalink**) 03-28-2009, 06:36 PM

In the end I ended up using 10 inch spokes in a double cross pattern. The stock spokes on this particular wheel with the original hub were 10 and 3/8 inches.

I am still not sure how I am going to mount the brake cable, this hub did not come with any hardware.

If anyone has this hub or something similar, I would appreciate it very much if you could post a photo of the brake cable hardware at the hub so I can try and understand how to set it up.

myke

Large Filipino · #8 (**permalink**) 03-28-2009, 08:35 PM

Is 25 bucks the normal price for that hub or was it just laying around and the seller threw out a price?

myke · #9 (**permalink**) 03-28-2009, 08:53 PM

It was laying in the the glass case, I asked how much and they searched through about 7 catalogs looking for a price, then I said would ya take $25 and he said sold.

They never did find it in a book and it did not come with any of the hardware.

myke

azbill · #10 (**permalink**) 03-29-2009, 01:26 AM

here you go myke...hope it helps

mine is a sturmey-archer x-fd