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SRAM to launch a complete high-end MTB grouppo

MrPlow

Monkey
Sep 9, 2004
628
0
Toowoomba Queensland
With 5 or 6 speed, you don't need the 150mm rear as the 135 can be made dishless, without the 150 rear, you don't need the 83mm BB so you get better ground clearance and Q factor. Doesn't help with room for suspension on some designs though. I don't think the slightly wider stance of 83mm BB would make much difference to stiffness or strength.
How do you get better ground clearance with a narrower BB? I would argue it is the other way around (assuming we are talking cornering?)
A wider BB also gives a lot more stability for DH (tripod example) and in my opinion this is very noticable.

There seems to be huge demand for less gears though, I only run 7, although not to full advantage as it is 9 speed - 2. And have never missed to extra gears.
 

no skid marks

Monkey
Jan 15, 2006
2,511
29
ACT Australia
How do you get better ground clearance with a narrower BB? I would argue it is the other way around (assuming we are talking cornering?)Yeah only with a narrower BB axle also, your pedals aren't sticking out as far when leaned and pedaling.
A wider BB also gives a lot more stability for DH (tripod example) and in my opinion this is very noticable.With your feet(pedal axles)at least 32cm appart, you can notice that they're 1cm further apart? I guess it's possible, worthy though? For me it's a trivial amount and I'd prefer a lighter ,and narrower BB, and rear end.

There seems to be huge demand for less gears though, I only run 7, although not to full advantage as it is 9 speed - 2. And have never missed to extra gears.
Heck 3 or 4 speed would be heaps for most DH tracks, but not all DH tracks need the same gearing, so five or six is more practical.
 

MrPlow

Monkey
Sep 9, 2004
628
0
Toowoomba Queensland
Sorry, I derailed the thread a bit.
NSM,
If you have a wider BB and assume your outside foot is at 6 o clock then it would be further from the ground.
Swapped my bike with a mates for a run, his is an old m1 (XTR and 68mm BB( to my Sunday (83 with FSA cranks) first thing I noticed was the narrowness of the Intense, may have been the cranks and BB combined, which would be over 20mm difference.
 

no skid marks

Monkey
Jan 15, 2006
2,511
29
ACT Australia
I didn't think of that, I don't think I've ever clipped the outside pedal though, only the inside when pedaling whilst leaned.
I don't think it's a big deal, I think a simpler narrower rear end is more important and even that isn't, but if your only running 5 or 6 gears, and your frame doesn't need extra room to fit the swingarm or links or whatever in, wouldn't 135/73 be better? Remember I'm only supporting -70kg of flesh, so wider stance probably isn't as noticeable to my skinny ass, and I'm only 5,10.
 

Bikael Molton

goofy for life
Jun 9, 2003
4,010
1,143
El Lay
Why are people talking about what gears they use in DH when the topic at hand is super light XC stuff? People need different gears for different applications.
Because the last 3 or 4 times a cog was added to the cassette, the whole industry was forced to adopt the standard.

Some of us are bitching because we don't agree that xc race (or Campy) should define the drivetrain.

Different gears for different applications is our point. We have never had different gears supported by the MTB industry in our entire history until the semi-support for Singlespeed and Dual Ring / Single Ring gravity drivetrains w/chainguides came along very recently.

-r
 

punkassean

Turbo Monkey
Feb 3, 2002
4,561
0
SC, CA
I might be wrong but I don't think a 10-tooth cog is workable with current freehub/axle standards, pretty sure the diameter is too big. 11's are already pushing it. To make a 10 I think they'd have to use something like a step down set up or some other new design. Not sure but getting sufficient wrap might also be an issue with current chain link spacing.
I've always wondered about this myself...I believe its the cassette body, not the axle diameter that's inhibiting so Why not make a slightly shorter cassette body and have a smaller diameter 10t lockring/driver? Seems to me it would work just fine. If it works with BMX axles then why not MTB?...
 

michael t

Chimp
Nov 9, 2009
3
0
Yo homie,
not sure why my handle had to change, but here goes the correct info-
It is really a simple math equation.

Steve Peat uses SRAM 10 speed. Steve Peat runs the e*thirteen guide rings and LG1+.
Steve Peat wins 2009 World Championship. So yeah, I think they work OK.

oh, you want another example? sure!

Sam Hill uses SRAM. Sam Hill runs e*thirteen guide rings and the SRS+.
Sam Hill wins 2009 World Cup Championship.

How bout dem apples?
Also, you know where e*thirteen is at. You could have called me on the bat phone for that answer!

Michael
(seriously.... why can't I use 'swiss' as my user name????!!!!!)
 

punkassean

Turbo Monkey
Feb 3, 2002
4,561
0
SC, CA
Yo homie,
not sure why my handle had to change, but here goes the correct info-
It is really a simple math equation.

Steve Peat uses SRAM 10 speed. Steve Peat runs the e*thirteen guide rings and LG1+.
Steve Peat wins 2009 World Championship. So yeah, I think they work OK.

oh, you want another example? sure!

Sam Hill uses SRAM. Sam Hill runs e*thirteen guide rings and the SRS+.
Sam Hill wins 2009 World Cup Championship.

How bout dem apples?
Also, you know where e*thirteen is at. You could have called me on the bat phone for that answer!

Michael
(seriously.... why can't I use 'swiss' as my user name????!!!!!)
sweet! I think 1x10 is in my near future, with an XCX of course. thanks for the info, I woulda called ya but I didn't want to be a pest and now this way everyone knows the answer. So hopefully I saved you a bunch of time on the phone repeating yourself! okay maybe not. ;v)
 

punkassean

Turbo Monkey
Feb 3, 2002
4,561
0
SC, CA
Nope no XX shifter,see

XO shifter


RED 10 speed cassette & XO mech
must be a custom shifter because X0 doesn't have enough detents. The X0 rear derailleur would work just fine but the shifter has to be custom. which wouldn't surprise me at all being on Peat's bike.
 

Acadian

Born Again Newbie
Sep 5, 2001
714
2
Blah Blah and Blah
Yo homie,
not sure why my handle had to change, but here goes the correct info-
It is really a simple math equation.

Steve Peat uses SRAM 10 speed. Steve Peat runs the e*thirteen guide rings and LG1+.
Steve Peat wins 2009 World Championship. So yeah, I think they work OK.

oh, you want another example? sure!

Sam Hill uses SRAM. Sam Hill runs e*thirteen guide rings and the SRS+.
Sam Hill wins 2009 World Cup Championship.

How bout dem apples?
Also, you know where e*thirteen is at. You could have called me on the bat phone for that answer!

Michael
(seriously.... why can't I use 'swiss' as my user name????!!!!!)
get a real job...
and haircut..
 

michael t

Chimp
Nov 9, 2009
3
0
HA!!!!! takes one to know one!


seriously though, i am right. you might be right. it is okay as I am superior. ha ha!

ultimately i know way too much for my own good.....

michael
 
Last edited:

Delimeat

Monkey
Feb 3, 2009
195
0
Canada
I've always wondered about this myself...I believe its the cassette body, not the axle diameter that's inhibiting so Why not make a slightly shorter cassette body and have a smaller diameter 10t lockring/driver? Seems to me it would work just fine. If it works with BMX axles then why not MTB?...
How about a 10 tooth lockring/cog combo? Obviously the shifting mojo would not line up but how much would it matter if the next cog was only a 12 toother? A nice 10-36 spread cassette that would go nicely with my FSA 386 b/p 27 tooth single ring/guide combo...

Back in the day most lockrings happened to be cogs as well.
 

gemini2k

Turbo Monkey
Jul 31, 2005
3,526
117
San Francisco
*Yawn*. Singlespeed FTW.

Any moderately able-d rider can ride pretty much any DH trail with a 38-16 SS setup (or somewhere near that). Hell, when it comes to resort riding you should be able to hit 99% of the trails and features without ANY chain. Might not be as fast, but is cheaper and easier. And anyone who rides REAL rocky/technical trails knows that derailleurs shifters and what not are an expensive pain in the ass. IF you're not breaking 1 derailleur or more a year...

P.S.
Where's my gearbox? Year 10 or so since we started seeing "prototypes"?
 

Dox

Monkey
Aug 26, 2009
263
0
Montreal, QC, Canada
And anyone who rides REAL rocky/technical trails knows that derailleurs shifters and what not are an expensive pain in the ass. IF you're not breaking 1 derailleur or more a year...
could you elaborate? I ride bromont all summer long (I think it got "real" rocky/techy sections) and use 1 der a year in general.
 

crohnsy

Monkey
Oct 2, 2009
341
0
T Bay
How about a 10 tooth lockring/cog combo? Obviously the shifting mojo would not line up but how much would it matter if the next cog was only a 12 toother? A nice 10-36 spread cassette that would go nicely with my FSA 386 b/p 27 tooth single ring/guide combo...

Back in the day most lockrings happened to be cogs as well.
9t-26t 9 speed cassette Shimano Capreo. so its been done but requires a special freehub/axle..





http://www.sheldonbrown.com/capreo/index.html
 

dondon

Monkey
10 tooth (or 9) not a bad idea for DH app. With low BB's and 8-10" travel it helps running a lower profile 36 tooth w guide up front. But some tracks a 36-11 just isnt enough gear. A ten tooth would help. I wonder if any prod developers/managers just heard the penny drop.
 

buckoW

Turbo Monkey
Mar 1, 2007
3,777
4,699
Champery, Switzerland
10 tooth (or 9) not a bad idea for DH app. With low BB's and 8-10" travel it helps running a lower profile 36 tooth w guide up front. But some tracks a 36-11 just isnt enough gear. A ten tooth would help. I wonder if any prod developers/managers just heard the penny drop.
They are one step ahead Sven.