Tracking back to this thread, since I've become interested in this Grand Bois 120mm cassette, I found that the link to the Compass web site is defunct. Going directly to their main web site and searching for components under the heading "Hubs," I found only a 130mm available. While it looked to be a great idea, it must not have attracted much interest and is yet another good option that has now disappeared.
On Thursday, March 2, 2017 at 1:33:40 PM UTC-6, Steve Palincsar wrote: > > > On 03/02/2017 12:17 PM, Wayne Naha wrote: > > No, Steve, it doesn't have to be a freewheel at all. The Grand Bois 120mm > cassette you found is amazing. I had no idea that such a thing existed. > It really is ideal. I really wasn't relishing the use of a freewheel, > mainly because they don't seem to be made anymore. And with the Grand Bois > I can get an extra cog tucked in back there, which is nice. The rear > spacing of this bike has been the sticky wicket in the whole 700C > conversion project. It made no sense to me to go to all the effort and > expense of ditching the 27" wheel, only to keep the freewheel. Thanks for > the info! > > > > https://www.compasscycle.com/shop/components/hubs/grand-bois-120mm-cassette-hub/ > > for the hub (currently 32 hole out of stock, 36 hole in stock) and > > https://www.compasscycle.com/shop/components/hubs/grand-bois-6-speed-cassette/ > > for the cassette. "These custom cassettes from Grand Bois are made for use > with the 120mm spaced Cassette Hubs, allowing you to breathe new life into > an older frame. The cassettes uses Shimano 7-speed cogs and spacers, so > 7/8-speed chains must be used. Ratio: 14-16-18-21-24-28" Mate that with a > 7 or 8 speed index shifter and a recent Shimano rear derailleur and you've > got a mostly modern bike. > > Couple that cassette up with the proper choice of chain rings, and you can > really make a pretty nice drive train. Here's a configuration that would > tick all of my boxes: > > 50/34/24 700x32 6 spd 14-28 > > 96.4 63.6 46.3 > 84.4 55.7 40.5 > 75.0 49.5 36.0 > 64.3 42.4 30.9 > 56.3 37.1 27.0 > 48.2 31.8 23.1 > > And also note that thanks to the narrow hub and the flexible modern chain > you could use all six of the sprockets with the big ring and have no > cross-chain angularity issues. Given my basic parameters (high <= 100 gear > inches, low on the middle ring ~ 32", low on the granny ~ 20-23") this is > right there. No monster cliffs to fall off or struggle to climb up, no > zigzagging back and forth trying to eke out reasonable spacing and no major > compromises on range either. Not shabby at all. Actually, this is the > first time I've calculated a 34/50 that made any sense to me! > > > > On Thursday, March 2, 2017 at 9:46:04 AM UTC-5, Steve Palincsar wrote: >> >> I get the 120, but does it have to be freewheel? Grand Bois makes a nice >> new 120mm cassette hub that can fit a five or six speed Hyperglide cassette >> (made with 7 spd sprockets and spacers). >> >> On 03/02/2017 09:38 AM, Wayne Naha wrote: >> >> Bill, you are so correct about the sensitivity, II was not expecting this >> level of fun. And about finding a 120 mm hub! But I've got time on my >> hands to look. Thanks to all who have responded. That 120mm Grand Bois >> cassette hub is certainly an interesting option. >> >> On Wednesday, March 1, 2017 at 11:09:06 PM UTC-5, Bill in Roswell GA >> wrote: >>> >>> Certainly one of the most sensitive places to have surgery! Having had 3 >>> ankle surgeries over the years. >>> >>> Wonderful frame, would have to spend a good bit of cash to get something >>> like that built these days. 700 conversion is certainly worth going to. >>> Modern brakes have much less flex. >>> >>> As for wheels, modern rims with machined brake track (Mavic Open Pro, CR >>> 18 for instance) would be preferred. I like Shimano hubs because they are >>> easy to rebuild and service from that period. Downside is finding a 120 >>> freewheel hub built to a modern machined brake track rim. I'm sure there >>> are plenty of other excellent opinions. >>> >>> Cheers >>> Bill in Roswell, GA >>> >>> On Wednesday, March 1, 2017 at 11:21:03 AM UTC-5, Wayne Naha wrote: >>>> >>>> This past Monday a very helpful and friendly orthopedic surgeon kindly >>>> harvested a tendon from somewhere inside my right foot and used it to >>>> replace a long missing ligament that used to stabilize my ankle when >>>> walking. He also scraped out a good deal of osteo-arthritic buildup that >>>> had been limiting the range of motion of my foot. Recovery has been a bit >>>> painful so far. There can be no weight on the joint for three weeks. So >>>> here I am, reclining on the couch, a little loopy from pain meds, but so >>>> far not watching daytime TV. To pass the time, I'm kind of daydreaming >>>> about doing a 700C conversion to my 1976 Raleigh Gran Sport. It's a nifty >>>> little number with double butted 531 frame, fork, and stays. Years ago I >>>> installed a Moustache h'bar and Technomic Deluxe stem, also a new >>>> cartridge >>>> bottom bracket and a Sugino XD2 triple crank. Now for the wheels. I'd >>>> like to be able to take advantage of the huge variety of 700C tires. And >>>> going to 700C will give me more clearance for a wider tire, something I >>>> definitely want now that I am out in the country with all the washboard >>>> dirt roads. So, any suggestions on how to proceed? I've never done one >>>> of >>>> these conversions. >>>> >>> >> >> > -- 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 https://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.
