roller-cam brakes

[Tsundere]

Just bought these for a future project and would like to know more about them, specifically what model they are and where they rank in the roller-cam hierarchy etc, I'm guessing by the low price, the plastic rollers and lack of 'Cunningham design' stamped on the bridge that they are pretty much bottom end.



It seems most of the ones for sale right now have brass rollers, would it be possible to upgrade them? If yes how hard are they to get hold of?
I've had most common brake types over the years but never roller-cams, so any info or tips at all would be very much appreciated.

 

[doctor-bond]

The ones I’m familiar with are XC Sport (not drilled), XC 9000 (sometimes drilled, sometimes smooth) and XCD (different wider cam shape). I’ve never seen plastic rollers, but you can get Brass ones

I’d guess yours are some variation of the sport range: is there a 2 letter date code? That might help To track em down via velobase, etc.

They all polish up well, are endless fun to set up (!) and are way cool.

 

[Tsundere]

Thanks for the link, but shipping = $60 I found these though so all good.

I'm still waiting for them to arrive so I only have sellers pics to go by...
Looks like one set is CH but other is unclear, maybe CG?


Any idea how to decode?
EDIT: Look like XC Sport 7000 1987-88

VeloBase.com - Component: SunTour XC Sport 7000

Cheers for pointing me in the right direction

 

[Tootyred]

Try this....and he's one of our very own....

Search Results for “Roller” – https://www.bicyclist.cc

This is where you can browse products in this store.

bicyclist.cc

 

[Tsundere]

Try this....and he's one of our very own....

Search Results for “Roller” – https://www.bicyclist.cc

This is where you can browse products in this store.

bicyclist.cc

I shop there a fair bit, first place I looked ; ) great stuff and fair prices.

 

[Tsundere]

Just found this interesting article with a bit of history and tips for setting them up.

Roller Cam Brakes: How to Adjust and Compatibility

Roller cam brakes are a type of rim brake often found on 80s mountain bikes. This guide reviews them, explains how to adjust them, and explains compatibility

wheretheroadforks.com

 

[doctor-bond]

Was just about to link that! C is 1986 so yours are quite early and the plastic rollers were an early spec that was recalled, according to that link.

 

[Tsundere]

Yes, good job the brass is on the way

 

[BlackCat]

Interested in finding out how much you enjoy setting them up.. I’ve acquired a few sets of “interesting” brakes over the years..

… aaaaaannnd never yet failed to curse myself during set up for not just sticking to 737s and moving on with life…

 

[Tsundere]

Interested in finding out how much you enjoy setting them up.. I’ve acquired a few sets of “interesting” brakes over the years..

… aaaaaannnd never yet failed to curse myself during set up for not just sticking to 737s and moving on with life…

Not going to lie, I am dreading that bit