Emain Jan.
On 03/22/2017 09:33 PM, George Schick wrote:
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/
<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/
<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
<mailto:rbw-owners-bunch+unsubscr...@googlegroups.com>.
To post to this group, send email to rbw-owners-bunch@googlegroups.com
<mailto: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.
--
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.
