> They went with 130 because the hub required more spacing and more > dish. The 8 speed hub is bigger to accomodate the extra cog. The 9 > speed spacing got tighter but still used the same hub as a 7 speed.
Correction: that should have said "8": The 9 speed spacing got tighter but still used the same hub as a 8 speed. Sorry. -chris On Dec 4, 10:25 am, tallsteelbikes <[EMAIL PROTECTED]> wrote: > On Dec 3, 4:36 pm, "PATRICK MOORE" <[EMAIL PROTECTED]> wrote: > > > But 8 sp was indeed slightly closer spaced than 7 -- which is why, > > presumably, they went with 130 instead of 126 OL spacing. > > They went with 130 because the hub required more spacing and more > dish. The 8 speed hub is bigger to accomodate the extra cog. The 9 > speed spacing got tighter but still used the same hub as a 7 speed. > > Bottom line: use a 7 speed hub for minumum dish. 8/9 speed hubs with > always increase dishing over 7 speed hubs. If you want more speeds, > put 9 speed cogs on a 7 speed freehub and leave one cog off for a > hybrid 8speed system on a 7 speed hub... > > -Chris > > tallsteelbikes.googlepages.com > > On Dec 3, 4:36 pm, "PATRICK MOORE" <[EMAIL PROTECTED]> wrote: > > > Just to toss a (rusty) wrench into Steve's comments (because he's > > recently been mean to me, offlist) I must add that one really doesn't > > need multiple cogs at all; or if you have a second (you wimp, you) > > just screw it onto the other side of the hub like the rest of us. No > > dish, no mess, no worries. > > > But 8 sp was indeed slightly closer spaced than 7 -- which is why, > > presumably, they went with 130 instead of 126 OL spacing. > > > On 12/3/08, Steve Palincsar <[EMAIL PROTECTED]> wrote: > > > > On Wed, 2008-12-03 at 11:25 -0800, tallsteelbikes wrote: > > >> The cog spacing got tighter when they went from 6 to 7 not from 7 to 8 > > >> speed. > > > > According to the table on Sheldon's site > > >http://sheldonbrown.com/k7.html > > > both sprocket thickness and spacer thickness changed between Shimano > > > Hyperglide 7 and Shimano 8. The 7spd is 1.85mm sprocket thickness, > > > 3.15mm spacer thickness, and the 8 is 1.8mm sprocket thickness and 3.0mm > > > spacer thickness. Center to center spacing went from 5.0mm for 7 spd > > > Hyperglide to 4.8mm for 8spd. > > > >> So if you want a stronger wheel with less dish go with 7 speeds or > > >> less on a 7 speed freehub cassette system or a 5/6/7 speed freewheel > > >> system. > > > > Or, as others have suggested, you can use an asymmetric rim. > > > >> Who really needs or wants 8/9/10 speeds > > > > For some applications the closer spacing of gears (not sprockets) gives > > > you some advantages. To me those advantages primarily apply to lightly > > > loaded bikes. When I pack on some cargo, I find I lose momentum quickly > > > enough that the 1-tooth gear changes that seem so nice and handy on an > > > unloaded bike become insignificant piddling hardly worth shifting for. > > > >> and weaker wheels with more cost and maintenance anyway? > > > > Not a given, as far as I'm concerned. Maintenance is no different; > > > chain and sprocket life seem to be the same. > > > >> Only reason is if you are stuck on STI > > >> or just need the latest gadgets to keep up with the Jones'. > > > > And we haven't even mentioned the 2009 Campagnolo Super Record group -- > > > the one they should have called the Spinal Tap Gruppo (because it goes > > > to 11). I think bikesnobnyc's take on that fully represents my > > > position. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To post to this group, send email to rbw-owners-bunch@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en -~----------~----~----~----~------~----~------~--~---
