 Topic Name: 2X9 Setups
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on: March 22, 2010, 11:43:59 AM
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intheways
Posts: 129
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« on: March 22, 2010, 11:43:59 AM » |
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Curious as to how many of you are running 2X9 setups and what combination of chainrings are you running?
Thanks
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Topic Name: 2X9 Setups
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Reply #1 on: March 22, 2010, 08:22:28 PM
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ScottM
bikepacking.net admin
Location: Wherever the GeoPro is parked.
Posts: 2863
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« Reply #1 on: March 22, 2010, 08:22:28 PM » |
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I run 20 and 32 tooth chainrings and 11-36 cogs. That's on a 29er. Only very rarely do I miss the big ring.
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Topic Name: 2X9 Setups
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Reply #2 on: March 23, 2010, 07:01:58 AM
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AZTtripper
Moderator
Location: Tucson, AZ
Posts: 1732
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« Reply #2 on: March 23, 2010, 07:01:58 AM » |
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Thumbs up for a 20x36 granny on a 29r I have run 2x9 in the past the new cranks still have the big ring but I use it so rarely I will likely drop it at some point.
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Topic Name: 2X9 Setups
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Reply #3 on: March 23, 2010, 09:58:22 AM
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wdlandparker
Location: Woodland Park, CO
Posts: 104
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« Reply #3 on: March 23, 2010, 09:58:22 AM » |
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when I ran gears I ran a 32-20 in the front and and an 11-34 in the back
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"what now ma nature, what now hahaha?!?!"
(cue hailstorm)
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Topic Name: 2X9 Setups
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Reply #4 on: March 23, 2010, 10:00:05 AM
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intheways
Posts: 129
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« Reply #4 on: March 23, 2010, 10:00:05 AM » |
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Thanks for the replies. My bike sees a fair amount of tarmac time, so I will probably use a slightly larger big ring and have the granny for a bailout.
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Topic Name: 2X9 Setups
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Reply #5 on: March 23, 2010, 01:29:01 PM
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jeremy11
Location: Grand Junction, CO
Posts: 263
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« Reply #5 on: March 23, 2010, 01:29:01 PM » |
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I'm running 2x9 on my Jabberwocky with a 34/22 up front and 13-36 in the back. The big combo is a little easy for road riding, but not a big deal. I may put an 11 or 12 tooth cog on to see how it feels, or even get a 36t ring up front. Here in Lake City, CO, most of the trails need granny gearing on the uphill, then going down you use the brakes and not the pedals. It's just running around on pavement and dirt roads where a bigger gear might be occasionally useful.
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Topic Name: 2X9 Setups
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Reply #6 on: March 25, 2010, 07:00:50 AM
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DoctorRad
Posts: 134
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« Reply #6 on: March 25, 2010, 07:00:50 AM » |
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Whatever chainring setup you're using, for off-road or luggage carrying work, I highly recommend Chris Bell's EggRings: http://www.highpath.net/cycles/ovals01.htmlThese are correctly oriented oval chainrings - BioPace was all wrong - individually made to your specification. My bottom line is: they work very well indeed to smooth out your power stroke and eliminate the dead spots at the top and bottom of your pedal stroke. I will be running my 40% oval 24-tooth and 30% oval 36-tooth on my next 2x9 set-up. More discussion here: http://www.retrobike.co.uk/forum/viewtopic.php?t=47932&highlight=eggringDr. Matt... |
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Topic Name: 2X9 Setups
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Reply #7 on: March 25, 2010, 07:56:24 PM
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Slim
Location: Duluth MN, North Central USA
Posts: 240
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« Reply #7 on: March 25, 2010, 07:56:24 PM » |
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I ran 24-36 x 11-34 with 175 cranks on my 26" mtb. I run 2 x 6: 22-34 x 17-34 on my 29er now, with 180 cranks, but that doesn't mean you should.
I would say: test which gears you can lose off the top or bottom with your current 3x9 and then do the math to figure out what combo gives you that.
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Topic Name: 2X9 Setups
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Reply #8 on: March 26, 2010, 09:02:33 AM
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jmadams13
Location: McSherrystown, PA
Posts: 3
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« Reply #8 on: March 26, 2010, 09:02:33 AM » |
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My XC race rig is 36/22 with 12-34. 26" HT btw
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Topic Name: 2X9 Setups
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Reply #9 on: March 26, 2010, 09:39:58 AM
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DaveC
Location: Kalispell, MT
Posts: 249
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« Reply #9 on: March 26, 2010, 09:39:58 AM » |
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My geared bike (FS 29er) has 20 and 34 rings (I kept killing big rings), and six speeds at 14-32. I spin it out on pavement occasionally, but that is no big deal.
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Topic Name: 2X9 Setups
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Reply #10 on: March 26, 2010, 09:51:22 AM
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intheways
Posts: 129
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« Reply #10 on: March 26, 2010, 09:51:22 AM » |
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Thanks for the replies I ran 24-36 x 11-34 with 175 cranks on my 26" mtb. I run 2 x 6: 22-34 x 17-34 on my 29er now, with 180 cranks, but that doesn't mean you should.
I would say: test which gears you can lose off the top or bottom with your current 3x9 and then do the math to figure out what combo gives you that.
I think that this is the approach I will take. |
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Topic Name: 2X9 Setups
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Reply #11 on: March 27, 2010, 02:21:39 PM
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Cereal_Killer
Location: Waynesboro, PA
Posts: 31
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« Reply #11 on: March 27, 2010, 02:21:39 PM » |
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Wondering where you all are getting the 20 tooth rings. Looked around but couldn't find them.
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Topic Name: 2X9 Setups
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Reply #12 on: March 27, 2010, 03:04:55 PM
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Topic Name: 2X9 Setups
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Reply #13 on: March 27, 2010, 03:23:16 PM
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Cereal_Killer
Location: Waynesboro, PA
Posts: 31
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« Reply #13 on: March 27, 2010, 03:23:16 PM » |
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Well, I'm blind. Sorry for missing that. Wish they made the 20 tooth in a steel 64mm. That would work for me, as I can't afford to pay $60 for the titanium one. It would be nice though. |
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Topic Name: 2X9 Setups
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Reply #14 on: March 28, 2010, 07:07:27 PM
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ScottM
bikepacking.net admin
Location: Wherever the GeoPro is parked.
Posts: 2863
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« Reply #14 on: March 28, 2010, 07:07:27 PM » |
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Dunno how this thread got locked while I was out bikepacking. Musta been my computer with a mind of its own. It's unlocked now.
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Topic Name: 2X9 Setups
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Reply #15 on: March 29, 2010, 12:55:40 AM
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DoctorRad
Posts: 134
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« Reply #15 on: March 29, 2010, 12:55:40 AM » |
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Wondering where you all are getting the 20 tooth rings. Looked around but couldn't find them.
All the old SunTour Microdrive chainsets had 20-tooth steel chainrings which are very durable. Microdrive was the forerunner to Shimano's Compact Drive and had 5-arm 56/94mm BCD chainrings, where Shimano Compact was 58/94. I still have two of them, one of which I was climbing on yesterday. Complete NOS or part-worn SunTour chainsets are readily available on eBay, though you'll need square-taper BBs to match. The 20-tooth chainrings rarely come up on their own, but if you find a part-worn chainset, chances are the steel inner ring will have survived very well. Since 94mm became the Shimano 5-arm standard BCD, replacements for the middle and outer rings are readily available. Just make sure the BB tapers aren't mashed if you're buying part-worn. |
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Topic Name: 2X9 Setups
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Reply #16 on: April 01, 2010, 05:20:23 AM
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Topic Name: 2X9 Setups
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Reply #17 on: April 11, 2010, 07:33:14 PM
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intheways
Posts: 129
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« Reply #17 on: April 11, 2010, 07:33:14 PM » |
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Thanks for all the replies. I decided to go 26-42 up front and 11-32 in the back. Should give me a wide enough spread for all of my riding!
Thanks
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Topic Name: 2X9 Setups
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Reply #18 on: April 12, 2010, 01:44:08 AM
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DoctorRad
Posts: 134
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« Reply #18 on: April 12, 2010, 01:44:08 AM » |
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Thanks for all the replies. I decided to go 26-42 up front and 11-32 in the back. Should give me a wide enough spread for all of my riding!
That's quite a big jump at the front. Would be interested to know what rings and front mech you are using and how well the combination shifts. |
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Topic Name: 2X9 Setups
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Reply #19 on: April 12, 2010, 12:54:38 PM
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intheways
Posts: 129
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« Reply #19 on: April 12, 2010, 12:54:38 PM » |
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That's quite a big jump at the front. Would be interested to know what rings and front mech you are using and how well the combination shifts.
I can't give you much of an update yet as I've only used it for one ride, but so far, so good. I've been sing an FSA compact f. derailleur. |
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