Singlespeed & Fixed Gear - Which bottom bracket to get? - $30-$50 range

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traggatmot
09-13-10, 07:05 AM
Replacing my bottom bracket, a RPM BB 7420 - 68x103mm. Has about 4000 miles on it, should've lasted longer, but it's all grimey and crunchy.

Looking at:

Sugino CBB-103
http://www.ride-this.com/index.php/sugino-cbb103-bottom-bracket-jis-68-x-103mm.html?source=googleps

RPM (supposedly the same as Sugino?)
http://www.benscycle.net/index.php?main_page=product_info&products_id=10815&currency=USD

Origin8
http://store.citygrounds.com/store/product/5589/Origin8-Cartridge-Bottom-Bracket-68x103-JIS/

IRD (made by Tange)
http://www.nationalbicycleco.com/index.php?main_page=product_info&products_id=1621&zenid=9502f3aab626689a7e38947cec1083f3


Anyone have any opinions?


Thanks in advance.

Scrodzilla
09-13-10, 07:11 AM
I'd go for whichever one costs less, as they're all pretty much the same.
yokotas13
09-13-10, 07:23 AM
shimano is like 15 bucks?!?!?
wtf. you act like your lance. buy the cheapest **** you can

Scrodzilla
09-13-10, 07:33 AM
Read the original post. Shimano doesn't make a 103.
yokotas13
09-13-10, 07:37 AM
cant buy shims? i used a shimano with a shim to get my visp chainline right
TejanoTrackie
09-13-10, 07:39 AM
Also, Shimano uses a plastic adjustable (non-drive side) cup. The others are aluminum or steel.
TejanoTrackie
09-13-10, 07:43 AM
cant buy shims? i used a shimano with a shim to get my visp chainline right

That only works if you are trying to move the crankarm outboard, but not the other way, which is probably the case here.
Scrodzilla
09-13-10, 07:50 AM
Also, Shimano uses a plastic adjustable (non-drive side) cup. The others are aluminum or steel.

Not all Shimano are plastic NDS...but most are.
yobatts
09-13-10, 08:21 AM
I'd go for whichever one costs less, as they're all pretty much the same.

hhmmm i like this. so if i have a BB on my bike now. should i just find a crankset -bb. that will fit the bb thats on my bike..save some cash,time and work...
TejanoTrackie
09-13-10, 08:22 AM
Not all Shimano are plastic NDS...but most are.

Yeah, but the under $20 el cheapo cartridge ones definitely are plastic. The other brands are between $20 and $25, so it's really being penny wise and pound foolish to buy one with a plastic NDS cup just to save a few pennies.
traggatmot
09-13-10, 01:53 PM
hey all,

thanks for the help/suggestions. This bike requires so little maintenance, and has been so good to me, i don't mind spending 30ish for a nicer BB.

As for the crank arms, I'm re-using the same ones, just replacing the BB. Not trying to move them anywhere, which is why I'm getting the exact same size.

So, I guess I'll go with the Sugino....or any of them.