I wasn't aware that riv was actually offering dbl. but I have used the Sugino triple as a dbl and wasn't impressed by the performance. The only real advantages of a dbl are a bit of simplicity, a shorter rear derailler, faster more predictable shifting, and easier cleaning. But the gains are small. If I really need or want a very wide range of gears it seems to me that I will be better off with a triple. I run triples on my Saluki, Trek, and tandem. A 48/34 (or 38)/26 (or 24) with a 12-27 cassette will give smoother shifting, smaller steps, and a simpler pattern than an ultra wide range dbl. Personally I find I can't spin a 24/27 combination fast enough to keep the bike moving in a straight line.
As for the White VBC crank. I know a lot of riv fans are loath to put anything black on their bikes, and I'm pretty resistant too; but that crank is highly polished and looks much better in real life than in pictures. The rings are excellent. MUSA. Cheaper than a TA but not cheap , about the same as a Compass. It looks great on my Ram and is the best shifting bike I've had in 35 years of riding. Michael On Tuesday, December 3, 2013 1:13:38 AM UTC-5, ted wrote: > > No doubt a 16t delta between chainrings is a large gap, but I find it can > work well. Particularly if you want the kind of large spread of gears that > drives you to cogs with 4 tooth gaps at the big end. Lately I have been > using a 9sp 11/32 cluster with 30/46 rings. When I shift between the 30 and > the 46 in front I am not going to anything like the other end of the > cluster. For example, riding on the 46t ring and either the 21 or 24t cog, > if I want to go one gear easier its either shift to the next bigger cog or > go to the 30t ring and drop down 2 cogs to hit essentially the same gear. > Changing rings and shifting 3 cogs keeps the gear about the same. If I only > wanted to get down to a low 30s inch gear, I might prefer a 12-27 cassette > with 34/48 rings. But for now I prefer being able to go a couple gears > lower than that when I venture onto the hills in the local regional parks > and open spaces (note 34/27 is nearly the same gear as 30/24 so the 28 and > 32t cogs give me two more gears on the low end). > All gearing arrangements entail compromises. It is no surprise that > different riders, and especially riders in different terrain, find > different arrangements fit them better. > > On Monday, December 2, 2013 5:06:11 AM UTC-8, Michael Hechmer wrote: >> >> I have found a 16 tooth difference between rings unsatisfactory on two >> counts. First, when I shift between rings, the next gear I am looking for >> is somewhere at the other end of the cluster, and the wider the range of >> the cluster the more difficult it is to find that gear. A lot of momentum >> is lost on hills while I search for it. Second, front detailers will shift >> 16 teeth, but they don't really like it and tend to do it slowly. More >> momentum loss. I have found better ways to get a wider range double >> without these problems. First option is a 48/34, which will shift much >> faster and put the next gear exactly two cogs away. The 12/48 is plenty >> big enough for everything short of hi end field sprints. Better yet is a >> 44/30 with an 11-28 cluster. the 44/11 is the same as a 48/12 and the >> 30/28 is only a half gear higher that 34/34. This combination offers a >> cleaner shifting pattern and more closely spaced gears. I also find I >> actually have less need to shift the front at all, although my Campy >> derailler does it so effortlessly that I never hesitate. I have also found >> that this combination works very well with the new Shimano RD short cage, >> which greatly improves friction shifting. I am using the White VCB crank >> on my Ram and really like it, but you can also get a 44/30 with a number of >> cranks that offer 94 spiders - DaVinci sells one (made by White Ind) and of >> course the beautiful, but expensive TA Carmina. I wish RBW offered a good, >> sensible compact double. (hint, hint) >> >> Michael >> >> On Friday, November 29, 2013 4:24:27 PM UTC-5, Tom Virgil wrote: >>> >>> <http://interlocracing.com/defiant_double_130bcd1500.jpg> >>> >>> Interloc website <http://interlocracing.com/cranks.html> >>> Any experience or guidance on this crankset. The alternative is a >>> Sugino Alpina compact. >>> >>> Here is the VeloORANGE take >>> <http://velo-orange.blogspot.com/2010/11/grand-cru-110-or-alpina.html>on >>> their VO branded variant versus the Aplina. >>> >>> Thanks >>> >>> Tom >>> >> -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To post to this group, send email to rbw-owners-bunch@googlegroups.com. Visit this group at http://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/groups/opt_out.
