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Building 1st fixed gear, 2 questions (kinda long).(9 posts)

Building 1st fixed gear, 2 questions (kinda long).tamjam
Jun 24, 2003 7:19 AM
So I got a call from my LBS the Soma Rush I ordered last week is in. Sweet. While I was ordering the frame, we were talking parts too, and he had some NOS Suntour Superbe Pro cranks for $50 which I thought were kinda cool so I bought them. Save the fact that they have a 130 bcd instead of a 144 track pattern, and have a special taper which requires the use of a special $125 Phil bottom bracket, will I have any major issues with chainline by using a single ring on this double crank? I have found a Spot 42t ring in 130 that should work fine, so chainring availability doesn't seem to be a major issue. I'm not married to the idea of using these cranks either, since they were cheap and fetch good prices on eBay.

Secondly, I'm still debating track bars vs. moustache bars. If I go with the moustache bars, obviously standard aero road brake levers will be used. But if I go track bars, I was thinking about maybe using something like Paul's cross levers or other similar 'interrupters' that mount on the flats (I'll be using both front and rear brakes). I've asked two people if these levers can be used as primary brake levers (i.e. without using road levers also) and have receive two different answers, one said nope, they other said yes. Can anybody definitively break this tie? Is this a crazy stupid idea? The reason I'm considering it, is on my cross bike I use the cross levers for 90% of my braking, plus I love the sleek look of track bars with no road levers.

Thanks in advance.
ask people who've done it;.Steve_0
Jun 24, 2003 9:18 AM
I run interupters as my only brakes. Whomever said 'no' doesnt know what they're talking about.

Hope you dont mind constructive criticsim, but you need to start dawdling with your own equipment; 10 minutes of exploration of your very own interrupters would have answered your question. Always trust yourself before you trust others.
I have a 42 tooth chain ring on the inside of a Campy double.dzrider
Jun 24, 2003 10:59 AM
No problems here. Not a big fan of moustache bars. We have a set on an old Bridgestone hybrid and none of the 3 riders in the family who can ride the bike comfortably find they accomplish anything other than looking cool.
re: Building 1st fixed gear, 2 questions (kinda long).xxl
Jun 26, 2003 2:20 PM
What's the special taper on the Suntour cranks? I know Suntour used to have two (at least) tapers (i.e., VX, and Superbe, according to an old catalog), and recommended not mixing the two, let alone use Shimano BB's, but I've run Superbe Pros since '85 with a number of different BB's. Having faced this dilemna when the OEM BB went, I found that I could safely run Shimano square-tapered stuff, even the more modern cartridge units; currently running one now. Just try the fit, and see. I've found the biggest pain isn't finding the "proper" taper, but getting the right spindle length.

FWIW, I'm 6'4", 220lbs., a born domestique who generates a lot of torque, rides long distances reasonably fast, with absolutely no sprint.
Spindle infotamjam
Jun 26, 2003 6:29 PM
From Rivendell:
"(The Superbe Pro) crank requires a special spindle taper so if you can't get a Superbe Pro bottom bracket you must get the Phil..." My LBS found a Pro at EuroAsia w/ a 112 spindle so I'm trying that before spending the buckeroos for a Phil. It'll probably be too long, but worth a shot. Thanks for your comments though, if all else fails, I'll try the Shimano.
re: Building 1st fixed gear, 2 questions (kinda long).victorthewombat
Jun 28, 2003 7:20 AM
Tamjam;

You must be a Marin County local? Here is my $.02 worth.

The previous post is correct..there should not be a spindel taper problem, 4' has been the standard for quite some time. I think the Rush has a 68mm bottom bracket thus any 111 / 113 spindel should work just fine. My proclivity has always been that if the crank arms creep up the spindel for any reason..the crank arms are not worth using anyway. Thus worry about chainline more than the taper issue. With the 130bcd you should be able to mount that puppy on the outside or inside of the spider to achive chainline. Use BMX spacer to mount the chainline.

Good luck.

Victor
Question on using BMX spacers on the chainring...TFerguson
Jun 28, 2003 8:38 AM
The spider is notched for the chainring to fit. Is it still a good, tight fit using the spacers and having the ring stand off the spider?

I went through a lot of trouble lining up my chainline on a recent build so that I didn't have to use the spacers. Did I waste my time and money?
Thanks,
TF
No.victorthewombat
Jun 30, 2003 1:55 PM
TFerguson;

No. If you made it work w/o spacers more power to you. But usually the BMX mouting bolts usually are still too long to mount just one chainring on a spider that is intended for a double chainwheel. I cannot remember many instances where the chainwheel mounted perfectly the first time on a multigeared crank set, unless a pista or bmk crank spider was used.

Victor
Marin yes, good eye.tamjam
Jun 30, 2003 9:57 AM
Mill Valley to be specific.

All my ordered bits should be coming in over the next couple weeks so I'll know then if the Superbe bottom bracket 112mm spindle lines up with my Surly track hub.

Thanks for the help.