mpulsiv wrote: ↑Thu Nov 15, 2018 10:11 am
TheKaiser wrote: ↑Fri Nov 09, 2018 10:51 pm
I sent a message to LB looking for more pics and info on what their grooved brake tracks are like, as the stuff on their website all looked like it was picturing the disc configuration, and the description is rather vague. For instance, are the grooves running radially like on a Zipp Showstopper, or are they circumferential like a Mavic aluminum rim? Also, are they molded in, or machined after molding?
Replying to myself, I got pics of the new brake tracks from LB. Not sure if they are machined or molded yet, but I'd guess machined. They look pretty clearly "inspired" by the Zipp Showstopper brake tracks which have gotten pretty good reviews from what I've seen. LB also said their new use of graphene is not just in the brake tracks, but instead is graphene powder added to the resin, which is used on the whole rim structure. I'd be curious to know how much graphene changes the heat flow through the resin/fiber matrix. I know continuous graphene fibers are supposed to be great conductors, but in this sort of random orientataion it is tough to tell how much of a benefit it is without some real test data. It would be nice if it could help spread that heat out over the whole body of the rim rather than keeping it localized right in the most vulnerable and failure prone part, the brake track. Just thinking out loud, it could also make the resin stronger, even if it doesn't substantially change heat flow, although other companies (Easton jumps to mind) have tried doping their resin with carbon nano particles before and seem to have abanonded the tech without much explaination.
Have you pulled the trigger? I'm still on the fence after reading a comment about instability due to rim profile and braking performance.
"
Customer review" from
https://reynoldscycling.com/collections ... ducts/aero
"I have a pair of wheels I built with Light Bicycle 65 rims out of China. Those are built well and are actually almost as fast as Reynolds 65. Light Bicycle are
scary unstable. Plus the
braking isn't anywhere near as good. The braking of Reynolds 65 is powerful and smooth. There's no pulsating at all. They're laterally very stiff and responsive, and the rear hub engages extremely fast."
On a positive note, LB WR56C02 was proven to perform well. Kudos to Reynolds for teardrop rim profile which makes it stable in crosswinds.
Not yet. Since I am looking for a rim brake model, I was originally looking at 28mm options, as the newest gen Shimano brakes are approved for use with 28mm rims although that approval requires a special thinner aftermarket pad (which I think simply has less pad material, so you could probably just sand down your regular pads). I'd love to go 30mm and on the one hand, its only 1mm per side wider, but on the other hand, if 28mm really requires a special thin pad then there isn't much more room to spare. Since we already have snow here, I have some time to mull it over and hopefully see some user reports of people trying to fit 30mm rims in R7/8/9000 calipers. I've seen other folks saying that Sram calipers have substantially more clearance, so I also thought of picking up a set of them to try out, although with the different cable pull ratio they would theoretically lose some power when used with Shimano levers.
Oh, and FYI, the texturing on the new LB rims is apparently carved in via laser after molding the rims. This is in in contrast to the Zipps where the grooves are part of the mold, but LB is using the same molds for both rim and disc models so they have to add it after the fact. Not sure how much that matters, but thought it was an interesting factoid.
CBA = Chronic Bike Addiction
