http://www.bikeforums.net/ en Sat, 21 Nov 2009 19:08:41 GMT vBulletin 60 http://www.bikeforums.net/images/misc/rss.png http://www.bikeforums.net/ http://www.bikeforums.net/showthread.php?604346-Real-world-difference-between-28-34t-and-32-34t-and-Rear-derailleur-shifter-Qs&goto=newpost Sat, 21 Nov 2009 18:31:10 GMT I am currently trying to find a cassette and chainset to suit my new build. My current bike uses an 11-28t cassette with a 34-50t compact chainset. I find that the lowest gear this provides isn't really low enough for some hills and I find myself having to mash a bit. How much difference would using an 11-32t cassette with a 34-50t compact chainset give? I know the numbers - using an online gear calculator and it says at 70rpm I would drop from 6.8mph to 6.0mph.

I want something that is easier than what I currently have but also that isn't too easy such that it would never get used.

Alternatively I can go for a triple chainset (30/39/50) and an 11-28t cassette - what kind of real world difference would the 28/30 combination provide?

Also if I get the 32t cassette then I would need to get a MTB cassette and probably a MTB derailleur. Would these work ok with a 9 speed road shifter (say 105 or ultegra)?

I know I am asking a lot with these questions as they are somewhat subjective!

Thanks

Daven ]]> Bicycle Mechanics daven1986 http://www.bikeforums.net/showthread.php?604346-Real-world-difference-between-28-34t-and-32-34t-and-Rear-derailleur-shifter-Qs http://www.bikeforums.net/showthread.php?604325-i-feel-vibrations-around-my-cranks-when-riding-my-fg&goto=newpost Sat, 21 Nov 2009 16:43:17 GMT i recently cleaned up my chain, and now when i am riding i feel a vibration around the crank. if i get off and roll it around, i can feel it up to my saddle when it does it. it rolls smooth up to a point and then i will feel the vibration and then it will be smooth again. i also feel it when i am... i recently cleaned up my chain, and now when i am riding i feel a vibration around the crank. if i get off and roll it around, i can feel it up to my saddle when it does it. it rolls smooth up to a point and then i will feel the vibration and then it will be smooth again. i also feel it when i am trackstanding. i think it is around the trackstanding position where the vibration is felt. my chainline is straight. everything is tight. i am not sure what the deal is. ]]> Bicycle Mechanics vec http://www.bikeforums.net/showthread.php?604325-i-feel-vibrations-around-my-cranks-when-riding-my-fg http://www.bikeforums.net/showthread.php?604306-Vintage-Bike-New-Component-Upgrade&goto=newpost Sat, 21 Nov 2009 14:39:52 GMT I have a 1982 Trek 613 with SunTour Components that someone gave me two years ago. I ride it regularly but really enjoy my kids bike with brake lever shifters a lot. I've been looking for a new bike but a mechanic friend of mine suggested I buy brake lever shifters and the related components and update my Trek frame. I've been out of work and without much cash and this seems like a more efficient alternative. I've been shopping Shimano 105 components after reading on the Forums that is where the quality begins without going over the top in price.

What are the thoughts about adding the new parts to the old frame, which is really good shape, and about the 105s as the group to install? Can it be one, and if done correctly, would the results be positive?

FMR ]]> Bicycle Mechanics fatmanriding http://www.bikeforums.net/showthread.php?604306-Vintage-Bike-New-Component-Upgrade http://www.bikeforums.net/showthread.php?604305-My-Bike-Mechanic-Rides-14-000-miles-a-year&goto=newpost Sat, 21 Nov 2009 14:35:18 GMT *How many miles does your bike mechanic ride each year?* How many miles does your bike mechanic ride each year? ]]> Bicycle Mechanics 10 Wheels http://www.bikeforums.net/showthread.php?604305-My-Bike-Mechanic-Rides-14-000-miles-a-year http://www.bikeforums.net/showthread.php?604304-best-bike-mechanics-repair-book&goto=newpost Sat, 21 Nov 2009 14:29:59 GMT For a road bike with Shimano components, what book should I ask Santa to bring this year? Quality pictures & diagrams are most helpful to me. Any thoughts appreciated! ]]> Bicycle Mechanics Radix http://www.bikeforums.net/showthread.php?604304-best-bike-mechanics-repair-book http://www.bikeforums.net/showthread.php?604303-Can-you-get-bar-ends-with-several-positions-for-your-hands&goto=newpost Sat, 21 Nov 2009 14:22:35 GMT I've seen the bull bars, but I was wondering if any companies had made a bar end that has a drop down bar as well, so you get two extra positions. One higher and one lower. Links? Ta ]]> Bicycle Mechanics enfilade http://www.bikeforums.net/showthread.php?604303-Can-you-get-bar-ends-with-several-positions-for-your-hands http://www.bikeforums.net/showthread.php?604295-9-speed-chain-ring-with-10-speed&goto=newpost Sat, 21 Nov 2009 11:25:31 GMT will a 9 speed chainring work with a 10 speed setup?Thanks as usual will a 9 speed chainring work with a 10 speed setup?Thanks as usual ]]> Bicycle Mechanics bnelson http://www.bikeforums.net/showthread.php?604295-9-speed-chain-ring-with-10-speed http://www.bikeforums.net/showthread.php?604287-Shimano-Endbar-with-SRAM-Dual-Drive&goto=newpost Sat, 21 Nov 2009 08:54:30 GMT I am using an indexed Shimano End Bar shifter to operate the internal gears of an SRAM Dual drive. Two clicks per shift works really well. I am wondering if there is any way to make this into a one click system - some way to make it skip a click perhaps. I haven't tried to dissect the shifter yet. I thought I would ask first and see if anyone has done something similar or at least who understands how to take these shifters apart without destroying them.

Thanks - John ]]> Bicycle Mechanics akohekohe http://www.bikeforums.net/showthread.php?604287-Shimano-Endbar-with-SRAM-Dual-Drive http://www.bikeforums.net/showthread.php?604257-Has-anyone-made-a-tool-for-SID-Dual-Air-Upper-Retaining-Tool-114-308-299-000&goto=newpost Sat, 21 Nov 2009 04:23:24 GMT Has anyone made a tool to remove the dual air upper tube retainer? The rockshox tool part number is 114.308.299.000. I have determined that the two ends are probably a 19mm nut. Any ideas? I didn't want to pay 30.00 for a tool I would use very little. ]]> Bicycle Mechanics yumseyo http://www.bikeforums.net/showthread.php?604257-Has-anyone-made-a-tool-for-SID-Dual-Air-Upper-Retaining-Tool-114-308-299-000 http://www.bikeforums.net/showthread.php?604240-Cracked-alum-frame-at-rear-seatpost-entry&goto=newpost Sat, 21 Nov 2009 02:48:08 GMT Hello and thanks in advance. So my problem is this. I have a small crack in the rear of the frame where the seatpost would insert on my 2003 Cervelo Soloist (alum). I have been reading in this forum about TIG welding as an option but was curious to see what other thought was the best fix. ... Hello and thanks in advance. So my problem is this. I have a small crack in the rear of the frame where the seatpost would insert on my 2003 Cervelo Soloist (alum).

I have been reading in this forum about TIG welding as an option but was curious to see what other thought was the best fix. The mechanic at my lbs told me this crack when fixed SHOULD be okay as it doesn't receive an overwhelming amount of stress. Is this accurate at all?

Is this crack worth fixing? I am willing to pay to keep this frame in use if it that's the big factor. Thank you in advance.





My apologies on the low quality pics. ]]> Bicycle Mechanics jk1199 http://www.bikeforums.net/showthread.php?604240-Cracked-alum-frame-at-rear-seatpost-entry http://www.bikeforums.net/showthread.php?604214-Rear-derailleur-adjustment-pulling-my-hair-out&goto=newpost Sat, 21 Nov 2009 00:13:53 GMT Recently, I've been working on my old Windsor Carrera Sport, c.1980, getting it back in shape after years of neglecting it. I'm having trouble getting the RD to shift right, though. It used to shift "like butter" back when it and I were young. Now, it doesn't.

The bike is mostly stock SunTour/Sugino/DiaCompe. The only thing in the drivetrain that's not original is the freewheel (and the RD--see below). It came with a SunTour 5-speed freewheel that wore out. I replaced it with an NOS 6-speed SunTour ultra-spaced freewheel. It never shifted right (from the time the 5-speed started wearing out, until now). I've worked things out mostly, except for one thing: it likes to double-shift, when shifting downward, between the middle great on the freewheel (2-->3 I usually end up on 4; 3--> 4 I usually end up on 5). In trying to sort it out, I've replaced the cables (of course--always an easy first thing to do), chain (SRAM 8-speed), rear derailleur (original well-used sloppy SunTour VGT Luxe, for tight NOS SunTour VGT Luxe). I've adjusted the b-screw on the derailleur, the pivot spring tension (easy to do on a VGT Luxe). Each of these things has made it a tiny bit better, without solving the problem.

What remains?

Chain length: I made the new chain the same length as the old chain. Actually, I didn't "make" anything. I didn't have to take any links off the new chain--it was already the same length as the old one. Some time in the mid-'80s I did take 2 links out of the old chain (why, I don't recall), but it still shifted fine at this length for years after.

Difference between the old FW and the new one: The original was a "typically-spaced" '70s 5-speed. It was either 14-32 or 14-34. The new one is a 14-34 6-speed. I don't have good enough calipers to measure it, but the I believe it's got narrower "ultra" spacing (I didn't have to re-dish the wheel when I put it on). This ought to get along fine with the 8-speed chain, though, I think. I don't have the old 5-speed anymore (drat!), but I do believe the 5-speed's middle cogs may have been bigger than this 6-speed has. If I adjust the b-screw so that the jockey pulley is closer on the middle cogs, it's too close to shift to the 34-tooth cog (josckey wheel bangs into the side of it, in fact).

Bent hanger? To the naked eye, it looks fine. Perhaps I should take it to the LBS so they can measure it, but then they might want to do everything, and I've been fixing this bike myself for 30 years! [pride]

I've been working on bikes since I was 12, and on this bike since I first bought it, new, in 1980, so I know my way around a bike. Have I lost my touch ?

I wish I hadn't tossed the old freewheel. As I recall, the teeth were very worn on it.

So, what do you think? Should I try a different freewheel? Something else?

Picture here, as it looked before I replaced the chain and the RD. You can kinda see the big jump from teh low cog to #2:
http://www.flickr.com/photos/mcgreivey/3324327195/

I'll try to post better, newer pictures later. ]]> Bicycle Mechanics mcgreivey http://www.bikeforums.net/showthread.php?604214-Rear-derailleur-adjustment-pulling-my-hair-out http://www.bikeforums.net/showthread.php?604210-10-Speed-Ultegra-Chainring-question&goto=newpost Sat, 21 Nov 2009 00:06:09 GMT I have an Ultegra 5-bolt Triple Crank with a 10 speed cassette, and would like to replace the small 30T chainring with something in the neighborhood of a 26T ring. Anybody have any experience with this that could recommend a vendor for the chainring? I have an Ultegra 5-bolt Triple Crank with a 10 speed cassette, and would like to replace the small 30T chainring with something in the neighborhood of a 26T ring.

Anybody have any experience with this that could recommend a vendor for the chainring? ]]> Bicycle Mechanics hankbrandenburg http://www.bikeforums.net/showthread.php?604210-10-Speed-Ultegra-Chainring-question http://www.bikeforums.net/showthread.php?604209-Is-it-normal-to-for-rim-to-hit-ground-when-going-over-train-tracks&goto=newpost Fri, 20 Nov 2009 23:46:30 GMT Hi lately I have been finding myself going over train tracks and hearing the rim hit the ground, and today as i was leaving the driveway i heard my rim hit the ground again as there was a small gap from the drive way to the road, and I got a flat. anyone have suggestions how i should fix this? Hi lately I have been finding myself going over train tracks and hearing the rim hit the ground, and today as i was leaving the driveway i heard my rim hit the ground again as there was a small gap from the drive way to the road, and I got a flat. anyone have suggestions how i should fix this? ]]> Bicycle Mechanics otakux http://www.bikeforums.net/showthread.php?604209-Is-it-normal-to-for-rim-to-hit-ground-when-going-over-train-tracks http://www.bikeforums.net/showthread.php?604186-Chain-length-for-a-single-speed-46-19&goto=newpost Fri, 20 Nov 2009 21:41:36 GMT Hi, all -

I've been rebuilding and repairing a garbage-picked Huffy English 3-speed. Project bike. The rear hub is a Shimano, not the classic SA. It's been baptism by fire - learning how to do it as I go.

Right now, I'm working on the chain. My problem is trying to figure out the length chain I need. There wasn't a chain when I found the bike. I have a few spare 1/8" single speed chains (for, like, a BMX bike) that I've decided to use for this 3-speed. But each is about one-half link (or, I guess, one link) too short to fit on my 46/19 chainrings on this 3-speed. I have a master link, too, and some spare 1/8" link sections lying around.

I'm not sure if I should add a whole link to the chain I'm using, go out and buy a new chain, or slide the rear wheel forward in the dropouts to compensate for the half-link short. Will extra slack with a whole additional link be a huge problem? I'm not well-versed working on single-speed bikes, and don't want to bastardize a chain that may break one day by adding links to it.

Not exactly sure what other information you need to shed some light on this, so let me know if I can post more info about what I'm working with. Thanks in advance. ]]> Bicycle Mechanics NWrighteous http://www.bikeforums.net/showthread.php?604186-Chain-length-for-a-single-speed-46-19 http://www.bikeforums.net/showthread.php?604159-How-to-touch-up-scraped-front-chainwheel-shimano-105&goto=newpost Fri, 20 Nov 2009 19:04:05 GMT I may have touch(ed) my chainwheel regularly with my right shoes, in the period before using SPD. The black coating has been scraped off a bit here and there. How can I touch this up - not like to spray paint though... I may have touch(ed) my chainwheel regularly with my right shoes, in the period before using SPD. The black coating has been scraped off a bit here and there. How can I touch this up - not like to spray paint though... ]]> Bicycle Mechanics vsopking http://www.bikeforums.net/showthread.php?604159-How-to-touch-up-scraped-front-chainwheel-shimano-105