I'm running a 5 speed cassette on my DH bike and a 6 speed on my trail bike. Both on didhless single speed hubs, the 5 on a Hadley, the 6 on a Profile, both sweet hubs. Would be nice to have 12 gears on the trail bike like you mentioned. Use the front to double the range. I wonder if you could do it perfectly so you had 12 even gears, you'd have to change all rear gears to the other extreme when changing the front, but still be cool, not as cool as my Rohloff though.You know, this COULD also fire off a string of new products as well. Perhaps possibly a teeny, tiny rear cassette with an ubershort rear derailleur. Could mean less chain weight, less derailleur weight, less chance of smashing it on something(though I haven't had that happen in like...5 years?), may contain the necessary parts already to eliminate a chain guide...etc, etc.
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i'm so sure because i've ridden it, same with a lot of other people. it's going to be a very good thing for all mountain riding.and you're so sure about this because...? and what parts of a bike do are you referring to with "traditional system"?
If ISCG Tabs are required it should also fit with an e13 ISCG Adapter, or am i wrong, i do not know much AM Bikes with ISCG Taps thoughThis was at Interbike in Las Vegas.
The theories behind the idea are pure speculation.
Basically its a internal planetary gearing system for all bikes with ISDG mounts to hook it up to.
You will still have a rear derrailler and chain.
Every gear RPM will be reduced by about 50% and you will need less gears in the rear due to maximizing your drive forces VIA internal gearing system.
sorry man, my lips are sealed.beaverbiker could you answer that simple question - since you tested it and have an engineering background (I'm not asking for any design details, just whether it's cvt capable - ala the mandatory indexing put on honda's zero-max design transmission, or if its just strait up indexed, no cvt possibility)?
I'll go out on a limb here and believe you even since this is your first post. You described what it accurately could be. I'm still not 100% convinced this is it, because it just seems so lame for the industry to take an innovation made over 100 years ago and reincarnate it with a fancy marketing strategy. I'll continue working on my design now that it seems that SRAM's groundbreaking turbo nutter extreme revolutionary cheech and chong white widow filled vaporizer beast of a novel design is just a simple BB mounted planetary transmission with 2 drive ratios (hell 3 ratios have been available in the past with similar designs, come on SRAM).Yes I have ridden it.
Internal planetary gear on the crank actuated via normal shifter, just 2 gear options (about a 24/36 chainring equivalent), instant shift (you don't have to be pedaling), somewhat heavy, a little high on the "pedaling drag" at this point but hopefully they will work it out.
.......
This is the begining of the end for the drivetrain as we know it.
Something similar like the SRAM HammerSchmidt project, but technologically different: http://www.ridemonkey.com/forums/showthread.php?p=2999118#post2999118.
Yeti, I´ve posted 2 links in this thread: http://www.ridemonkey.com/forums/showpost.php?p=2999118&postcount=244 (in German only). I have no more informations so far.That B-box design looks clean. Do you have any link to more info on the mentioned magnetic clutch? How much heavier is it than a normal 2 ring setup?
yea this is true, but im not looking at it as a gearbox setup but as away of getting out of making up some funky frount derailleur for a high pivot AM bike with an idler.no real good new.
still have all that weight on the end of the rear arm bouncing up and down.
the BEST thing about a gearbox is the traction gained from less unsprung weight
after the sealed and straight chain advantages.