K2 / Proflex Riders Group
General => Tech Forum => Topic started by: sammydog on September 03, 2009, 07:47:30 pm
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Has anyone here tried a 2x9 or 1x9 setup on their bikes?
Just thinking about options on my bike. I don't tend to use either my big ring or little ring on my bikes so thought it may make sense to have a go at two (or even one) ring up the front of the bike.
If you have tried it, how did you find it and did you have any setup issues?
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I've got a 2x9 setup on my 5000, and as long as I'm on the East Coast, I'll never go back. (And I may never go back even if I move out west to bigger mountains). I love the extra clearance I get without the big ring. (I have a lightweight Shimano Saint bash guard). I don't miss the big ring at all. I took out a couple of links on my chain to keep it tighter, and I tightened the upper limit screw on my front derailleur to prevent it from dropping the chain, but other than that, no modifications.
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I took out a couple of links on my chain to keep it tighter, and I tightened the upper limit screw on my front derailleur to prevent it from dropping the chain, but other than that, no modifications.
I never thought of that. My 3 by 9 flops around to no end. Removing the big ring and a couple of links may be the ticket.
Terry
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I used to do something similar to matno but instead of a bash ring we would use old steel chainring's :D
Excellent for climbing over fallen trees ;D
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Just finished a build on a 2005 Razorback. I will post pics as soon as I get a nice sunny day and time to snap them. I am running a 2 x 9 and I like it. See this link if you are interested:
http://www.whiteind.com/cranks/mountaincranks.html
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Me and herself have been riding 1x9 for long time. We like the simplicity. A 28t (26t for her) chainring and BBG bashguard w/ 12-32 cassette. It suits our needs here in the Northeast (NY), USA. I really wanna use a 34t cog to make the climbs easier. I heard there could be (if not already) a 36t cog in future casettes. That'll allow for a bigger chainring, say 30+ and will be less wear on the chain. BTW, there's an extensive 1x9 thread in the "drivetrain" forum of MTBR.
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you've got these on the cheaper models:
(http://www.bikexcs.ro/catalog/images/FW723.jpg)
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..hmmm, 'looks like a heavier 7-speed cassette from yonder. I see that on a lot of local delivery bikes w/ non-SIS thumb shifters. Big jump shifting 6 to 7 and probably not gonna be smooth going uphill..
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I use all three rings on my bike, even though sometimes it is just the teeth on the big ring and a quick ratchet pedal move to go over a log I can't clear otherwise. I try to use a pedal to go over but if they are too high I have no qualms using the big ring to bite and motor over a log. When I ride hard surfaces I spend most of my time in the big ring and off road the big ring still has valid use, giving it up to put a bash guard on would limit me to about 20 mph while pedalling and I find that unacceptable.
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My 110 lb. daughter races with a 2x9 Middleburn(27-40) front and 12-34 rears on her hardtail. Before that it was 29-40 with an old C-dale crank. Turns out that spinning anything lower than 27/34 is slower than walking.
You'd be hard pressed to find 3 rings at the races, Adam Craig won XC in '08 at Mt. Snow with a single front ring. I think it was a 36t!
Check out the gearing charts in "Zinn's", you'll be pretty surprised at what even 1x9 will get you- just gotta' deal with the gaps....
Her Turner (built ESPECIALLY to conquer Mt. Snow!) now runs 29t front (single ring) with an 11-34 rear. 25.6 lbs RTR with real heavy tires. Snow shreds lightweights....
I'm gonna' hang some SRAM XX on that sucker sooner or later for a 1x10 if the chainline works out. ;D
P.S.; don't forget about the benefits of a short cage derailleur either!
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See this link. White Industries makes a very nice 2 x 9 crank. This might go cheap.
http://cgi.ebay.com/White-Industries-Crankset-175MM-ENO_W0QQitemZ260515788293QQcmdZViewItemQQptZCycling_Parts_Accessories?hash=item3ca7f37605
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Would like to see a 24t & 52 T chain ring set-up ;)
Thunderchild
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....or the front derailleur that could handle it! :D
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Well I've finally bit the bullet and will be going 1x9 next week with the 856 build. I just ordered an MRP 1.X chain guide. I'll keep you all posted on who it turns out.
I will be able to run anything from a 32 - 36 front ring and have an 11-34 cassette. That should cover me for most tracks.
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The Paul chainminder is a beautiful and effective piece of work also if your seatube is in the right place.
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The new XX system has a 11-36 10spd cassette coming. I was wondering if SRAM's new 2X10 system's crankset would work on my 5500. I wonder because they talk about a better Q factor, which I take to mean narrower, and would that clear the swingarms? I live in Maine, and there's no way I'm giving up my granny gear just yet. The races in this state take you up down hill ski courses. But the trails at the Orono campus are pretty flat and your in your middle all the time until you spill out onto some of the more open trails and service roads. I was actually able to make some ground up on the young guys in club on the more open stuff by using my road experience and pushing the big ring efficiently.
I am very tempted by the XX drivetrain, but I'm waiting for the gripshift version, which the weight weenie guys say is in development right now.
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IRD also has some interesting, wide spacing cassettes available for a fraction of what Sram wants for the XX. However, it looks like they only go up to 34. I wonder if you could pick up one of Action Tec's 36 tooth cogs, put it at the back of the cassette with a suitable spacer between it and a 34 tooth cog (which would be on the cassette), and then omit one of the smaller cogs like #2 to achieve something like 11-36 with with a log investment.
There's also these...costy, but maybe a little cheaper than XX, and occasionally the ComCycle website has 10% off sales.
http://cgi.ebay.com/Action-Tec-9-Speed-11-36-Oversized-Titanium-Cassette_W0QQitemZ230436513830QQcmdZViewItemQQptZCycling_Parts_Accessories?hash=item35a7162826
At least if you stay away from XX you're not on the hook for new shifters...I don't know if the Ultegra 10-speed flat bar shifters will work for XX spacing...seems like they should.
Here's another cheap 12-36 9-speed option:
http://cgi.ebay.com/NEW-SHIMANO-HG61-12-36-CASSETTE-FOR-29ER_W0QQitemZ360238967433QQcmdZViewItemQQptZCycling_Parts_Accessories?hash=item53dfea6a89
I'm thinking of doing a 1x9 setup because of a bonus Coda Magic 130bcd road crank I obtained in a package deal recently. I'd be forced to run no less than 38 up front...what are your thoughts on 38 x a 12-36 cassette for a 26" bike? Would I lose lots of granny gear power?
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I like that HG61 9 speed price. Would let you know if it is the hot ticket for you.
As far as adding a 36 tooth cog, it should work fine. I converted a Tioga 8 speed ti cassette to a nine speed by using thinner shims and an extra cog.
Terry
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Thanks for the confirmation, Terry. I wont be diving on this cassette's auction so someone else please feel free. My wife and I are gearing up for a car purchase, so I wont be buying any bike parts anytime soon. Am hopefully in the process of selling one of the Way Big 856 frames to a forum member.
Anyone on the list interested in a silver, Way Big 856 frame?
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Adam Craig Won a race on a 1X9 but I'm pretty sure he did it on a 36. If your Coda crank is a standard compact 110 BCD you can get some cheap FSA rings that will fit. A 38t 'ring seems too big too me, even with 36t cog in the back. But I prefer a double set up. I've read around on the CX forums, and even there a double setup seems to be more to my liking. Personally, I'd try to mimic the 42/28 that SRAM has come up with as a starting point, but that's me.
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You could do what I did...go 2x8:
(http://i5.photobucket.com/albums/y186/deusexaethera/bikes/CIMG0100.jpg)