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BB conversion ...(6 posts)

BB conversion ...Humma Hah
Jul 14, 2003 2:33 PM
... I've been thinking about treating the cruiser to a BB/crank upgrade. Several months of riding the Paramount with Campy cranks has made the shortcomings of the cruiser's BB all the more obvious.

I've fiddled and fiddled, but getting the old one-piece cranks to run true is pretty tedious work, and has never really worked well. I've ground and shimmed the chainwheel so that it ought to center up, but it always works itself out of center, resulting in the chain being tightest with the right crank a little forward of top dead center. The Paramount does not display this problem.

So I've got this perfectly good Campy Mirage sealed BB lying around, and I'm looking at a MRP BBC-1 Cup Conversion Kit Bikeman carries, and I'm thinking maybe its time to give that wonderful old machine an upgrade.

Any advice? QBP also has a kit. I've seen a couple of bikes converted this way on the 'net, including a "Super Typhoon" (my frame is a Typhoon).
Used to be fairly commonWalter
Jul 17, 2003 8:36 AM
Though I haven't done it. Yet..

Lots of people upgraded Schwinn "Varsinentals" that way. I plan on doing that with a BMX style bike I built for my daughter.

I used a full sized frame but fit it for her then 6 year old body by using a 1 piece crankset from a smaller child's bike. When she gets taller I'll convert to a full size 3 piece set.

Harris Cyclery sells a conversion kit as well. I'm sure Sheldon B. will share advice.

A good move for the old cruiser I think. I've always shook my head when I've read of your long rides and the main thing that came to my mind was spinning that steel Schwinn crank around for so long.
Here's a guy who's done it on the same frame as mine ...Humma Hah
Jul 17, 2003 10:06 AM
... but his is a fixie. I found his e-mail address elsewhere, and asked him how it was working out. I'm pretty sure now that the part I listed above is the one from the QBP catalog. He says he has had "NO problems" with his.

http://www.meister.com/rickc/super.htm
Cool bikeWalter
Jul 17, 2003 11:43 AM
Road fork, 700C wheels, moustache bars, fixie? And that's not even mentioning the Campy SR

One of the more unique bikes I've seen.

Like I said I'll be doing the BB conversion on my daughter's bike sooner or later.

Go for it and let me know how it comes out.
I like his description of the ride ...Humma Hah
Jul 17, 2003 12:12 PM
... which agrees with my feelings exactly. A Typhoon, properly equipped, is a GREAT-riding roadbike.

I could easily yank the wheels off the cruiser and put the Paramount's on to see how it works as a fixie with 700c wheels. The LBS-owner who helped me ruggedize it decades ago thought I should put roadbike wheels on it, and also recommended the BB conversion. I balked at both, then, as expensive and unnecessary. They're looking tempting now.
This guy did it on a Murray ...Humma Hah
Jul 17, 2003 12:07 PM
... I believe this is where I got the original part number.

http://www.ucalgary.ca/~mdsiewer/cycle/rod_murray.html