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3-speed fixed (bike) hub
Hey guys, just stumbled across this and thought you would be intrested. From 'www.cyclingnews.com' (http://tinyurl.com/4la9hc) Sturmey sets date for three-speed fixie – but will it be alone? Sturmey Archer's S3X fixed-wheel three-speed hub will be available in January, Sturmey's US marketing manager told BikeRadar at Interbike today. Retail price for the hub is expected to be in the US$140-160 range. The S3X will probably come with a multi-location shifter that can be used as a bar end or mounted on the down tube. Unfortunately, said Prosser, it's not possible to make it work with current brake/shift levers, so drop-in compatibility with, say, Shimano STI units, won't happen. Prosser said that the final production version of the hub will be lighter than the current prototype. It's hard to see where you save weight in a hub gear as there's an unavoidable amount of metal needed in the internals, and it's not like possible buyers of a three-speed fixie hub can go buy someone else's lighter alternative. Or can they? We haven't seen it yet, but SRAM apparently has a hub that can be switched between fixed-wheel and freewheel operation and is rumoured to be working on its own three-speed fixed hub. Prosser explained some of the background to the S3X project, which was basically by a steady stream of inquiries to Sturmey from various places around the ‘net (including, this writer, who stopped bothering Prosser about it when he told me that to resurrect the old ASC hub, Sturmey would need an order of 10,000 units.) Various people, including the late great Sheldon Brown, helped gauge the level of interest, and Prosser hinted that if the S3X is successful, then Sturmey will consider widening the range with, for example, a closer-ratio version akin to the original ASC. We are that much closer to a multi-geared uni hub -- saskatchewanian ------------------------------------------------------------------------ saskatchewanian's Profile: http://www.unicyclist.com/profile/14180 View this thread: http://www.unicyclist.com/thread/73977 Posted Via Usenet.com Premium Usenet Newsgroup Services ---------------------------------------------------------- http://www.usenet.com |
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#2
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3-speed fixed (bike) hub
They have been making internally geared hubs for many years. Is this a special super cool one? -- SHAY_CAM Bringing back the Bmx style unicycle. ------------------------------------------------------------------------ SHAY_CAM's Profile: http://www.unicyclist.com/profile/16229 View this thread: http://www.unicyclist.com/thread/73977 Posted Via Usenet.com Premium Usenet Newsgroup Services ---------------------------------------------------------- http://www.usenet.com |
#3
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3-speed fixed (bike) hub
YES this is huge theres no free wheel so it would work in unicycle unlike the other hubs that that would just free wheel -- colin340 ------------------------------------------------------------------------ colin340's Profile: http://www.unicyclist.com/profile/14925 View this thread: http://www.unicyclist.com/thread/73977 Posted Via Usenet.com Premium Usenet Newsgroup Services ---------------------------------------------------------- http://www.usenet.com |
#4
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3-speed fixed (bike) hub
colin340;1125062 wrote: YES this is huge theres no free wheel so it would work in unicycle unlike the other hubs that that would just free wheel I am almost absolutely certain that it would not be strong enough for any sort of unicycle use. Unicycling puts a huge amount of torque on the hub. Bicycles have a gear ratio that lessens the torque and the physics of bicycle riding doesn't put as much torque on the hub. I am excited about this development for my fixie bike. Seattle has some hills that can make fixie riding a challenge. Even just having a two speed shifting fixie would be nice. Just something to have a lower gear when you get to a steep hill. The three speed fixie hub is just extra. It will be interesting to see what the specs are and what they specify as allowable chainring size sproket size ratios. -- john_childs john_childs (att) hotmail (dott) com Team Never Wash Your Muni 'My Gallery' (http://tinyurl.com/3d57bn) :: 'Unicycling Bookmark List' (http://backcountry.unicyclist.com/) :: 'World Clock' (http://tinyurl.com/2blym3) ------------------------------------------------------------------------ john_childs's Profile: http://www.unicyclist.com/profile/449 View this thread: http://www.unicyclist.com/thread/73977 Posted Via Usenet.com Premium Usenet Newsgroup Services ---------------------------------------------------------- http://www.usenet.com |
#5
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3-speed fixed (bike) hub
Did a bit of quick searching cause I couldn't sleep and found that it has two underdrive gears and a 1:1 mode. I was hoping that the design could be possibly built as a unicycle hub (with stronger parts) but we really arn't looking for an underdrive hub. You could set up a sort of jack shaft design with this hub sitting above your wheel to give you a 3-speed unicycle that you shift by hand instead of kicking the hub. The long chains would not be so elegant as having a true geared hub but it would definitely be doable. I think I will file this away in the things to build when I have time and money to spare pile along with the 'GUWI' (http://www.unicyclist.com/forums/showthread.php?t=67196) I designed. I can picture it now, I could even do it without modifying the hub at all. As far as bikes go I don't have a fixie yet but I know one is in my future. Probably with a flip-flop though. maybe with some dingle gearing, don't know what is all possible yet. -- saskatchewanian ------------------------------------------------------------------------ saskatchewanian's Profile: http://www.unicyclist.com/profile/14180 View this thread: http://www.unicyclist.com/thread/73977 Posted Via Usenet.com Premium Usenet Newsgroup Services ---------------------------------------------------------- http://www.usenet.com |
#6
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3-speed fixed (bike) hub
3 speed? Fixie? This makes no sense! If it's 3 speeds, I don't think I'd call it a fixie, coasting or not. -- Joseppi 'Team Freestyle' (http://silentaftermath.com/) 'Team Roadshow' (http://teamroadshow.com/) ------------------------------------------------------------------------ Joseppi's Profile: http://www.unicyclist.com/profile/14145 View this thread: http://www.unicyclist.com/thread/73977 Posted Via Usenet.com Premium Usenet Newsgroup Services ---------------------------------------------------------- http://www.usenet.com |
#7
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3-speed fixed (bike) hub
sure it's a fixie, just not a single speed. -- saskatchewanian ------------------------------------------------------------------------ saskatchewanian's Profile: http://www.unicyclist.com/profile/14180 View this thread: http://www.unicyclist.com/thread/73977 Posted Via Usenet.com Premium Usenet Newsgroup Services ---------------------------------------------------------- http://www.usenet.com |
#8
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3-speed fixed (bike) hub
I wonder if this hub can handle the stresses of skidding. -- Joseppi 'Team Freestyle' (http://silentaftermath.com/) 'Team Roadshow' (http://teamroadshow.com/) ------------------------------------------------------------------------ Joseppi's Profile: http://www.unicyclist.com/profile/14145 View this thread: http://www.unicyclist.com/thread/73977 Posted Via Usenet.com Premium Usenet Newsgroup Services ---------------------------------------------------------- http://www.usenet.com |
#9
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3-speed fixed (bike) hub
Somebody built an ASC into a giraffe and took it to unicon in Guilford. IIRC it had lot of play when you changed gear. -- nickjb *Severn Wheelers.* Bristol's best (and only) unicycle hockey club Wednesdays, 8:30. All welcome ------------------------------------------------------------------------ nickjb's Profile: http://www.unicyclist.com/profile/1074 View this thread: http://www.unicyclist.com/thread/73977 Posted Via Usenet.com Premium Usenet Newsgroup Services ---------------------------------------------------------- http://www.usenet.com |
#10
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3-speed fixed (bike) hub
Sturmey ASC hubs, or 3- or 4-speeds modified to be fixed 2- or 3-speeds have quite a bit of slop/backlash in the gears - enough that a lot of fixed wheel bike enthusiasts say it takes away the feel of riding fixed. It would be a lot baggier than a Schlumpf uni hub. @John: You could build a two-speed fixed wheel bike using a normal fixed hub and a Schlumpf Speed Drive/Mountain Drive bottom bracket. Probably quite heavy, but possibly no heavier than a Sturmey hub, and better weight distribution. (Or modify a normal Sturmey 3- or 4-speed hub (quite fiddly apparently) - or pay silly money for an original ASC!) Rob -- rob.northcott ------------------------------------------------------------------------ rob.northcott's Profile: http://www.unicyclist.com/profile/7436 View this thread: http://www.unicyclist.com/thread/73977 Posted Via Usenet.com Premium Usenet Newsgroup Services ---------------------------------------------------------- http://www.usenet.com |
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