7
votes
0answers
104 views

Mechanism behind chain wear phases

Methods As an experiment I started taking regular chain stretch measurements, from when I first put on a chain until it is worn out. A Park CC-2 was used and each measurement was done in triplicate, ...
5
votes
0answers
109 views

Is changing wheel necessary if freewheel hub with a different speed then previous is attached?

Approx. 3 weeks ago I have found an abandoned frame (including steering wheel, fork, brakes, pedals and shifting gears attached to it). I decided to use it to build a new bicycle since only recently I'...
5
votes
0answers
156 views

Accurately replicating the resistance felt whilst riding via a resistance fan diy turbo trainer

If I were to build my own Lemond Revolution style turbo trainer (link below) could I use the air speed in meters/second^2 the rider is moving into as a good indicator of what type and size of fan to ...
4
votes
0answers
50 views

Cylinder volume of hydraulic brakes and levers

I've been asking around for a while now but even workshop pros couldn't answer this (by citing exact figures): How big are the brake cylinders of disk and rim brakes in terms of volume and surface ...
4
votes
0answers
479 views

Change the angle of the arc of downtube / stem shifter lever to make it an alternative thumb shifter?

I want to mount the following SunRace clamp-on shifter set horizontally as a "thumb" shifter on a straight MTB handlebar (22.2mm). I will remove the left lever and only use the right with the clamp. ...
3
votes
0answers
30 views

Uncut steerer tubes too short for 21" Frames

I am restoring two old bikes a 1996 Trek 8000 and 2000 Fuji Aloha. Both are 21" frames. The problem I am having is getting forks that do not cost $1000 and have steerer tubes with sufficient lengths. ...
3
votes
0answers
39 views

Internal cable routing blocked on '80s steel frame. What are my options?

I have a new-to-me ~80's steel frame with a rear derailleur cable that is routed through the chainstay. There's a blockage close to the BB end, and I'm wondering what my options are? My assumption is ...
3
votes
0answers
84 views

new 9-speed chain fails after 4 weeks and ~240 miles

About 4 weeks ago I installed a new SRAM PC-971 chain on my Surly LHT. This morning I've noticed that one of the outer chain link plates started to pull away (to spread in a way that the pin is not ...
3
votes
0answers
42 views

Alfine 8 gear crunch

Occasionally under load when taking off on the flat, I would get a crunch, then it runs smoothly. After reading the other post I had tightened the wheel nuts but this has not fixed the issue. I have ...
3
votes
0answers
64 views

Clear coat on top of old paint in order to preserve it/frame?

Using nail polish to touch-up scratched/rusted frames is more or less well-known (cf. Girls Biking to Work), but recently a hobbyist restorer of old bikes told me that you can "just apply clear coat ...
3
votes
0answers
82 views

Shimano STePS Di2 Shifting with Alfine 11 - will it be ever automatic?

The Shimano STePS with Di2 and Alfine 8 received a firmware update this year, which enabled automatic shifting (it was not automatic before). Does anybody know if Alfine 11 models will receive any ...
3
votes
0answers
71 views

what causes a sidewall puncture on a tubeless tyre?

I have a puncture, on the side of my tyre. The tyre was inflated to about 120 psi, and in any case I thought tubeless tyres were immune to snake bites. What's likely to be the problem?
3
votes
0answers
18 views

Tool for Cannonade Carbon Si Crankset

Used a 3/8" hex key to remove the crank but the outer bolt needs to be tightened separately. Perhaps it's possible to tighten it with the crank off or do I need a special pin type tool. Its a ~2008 ...
3
votes
0answers
183 views

Ritchey carbon MTB fork dropout wear

I was inspecting my carbon fork dropouts and I noticed the deformation of the edge on the outer side of the right dropout that makes me unhappy. I don't know what is the reason of this issue. Here are ...
3
votes
0answers
114 views

takhion-esque track frame identification!

I thinking on buying this very lightweight track frame that is very similar in looks to those beautiful takhion pursuit frames from the urss 80's. I was told that brazilian cycling federation bought ...
3
votes
0answers
191 views

Shimano Nexus 7 speed IGH, high gears tight shift

I have the popular Shimano, Nexus 7 speed, internal gear hub. After removing the back wheel to replace the old tire, I've found that changing gears especially from 5 to 6 and 6 to 7 (especially the ...
3
votes
0answers
51 views

Swain Power-HR relation

I am trying to understand how to use Swain HR to Power equation in my case. Here is a calculator where one can vary the inputs and see the various outputs based based on the equation: http://www....
3
votes
0answers
168 views

Specialized Brain problem

I have been searching for a while regarding a problem with my Specialized Brain. Here is the story.. I bought a 2008 Specialized Stumpjumper Expert 2nd hand and immediately noticed air in the shock. ...
2
votes
0answers
38 views

What handling differences should I expect when moving from a bike to a Recumbent Trike?

I have been riding a normal bicycle, I just purchased a used Sun EZ-3 SX Delta Trike. I only have about a dozen miles on it on a few short trips. There is an answer here indicating some of the ...
2
votes
0answers
33 views

Internal Roller Brake Problem

I have Shimano Inter M Roller Brakes on my bike. I felt the rear brakes were a bit light after riding 800 or so KM (total mileage on my bike so far) so I thought maybe theres a bit of cable stretch ...
2
votes
0answers
35 views

shimano fc4400 double chainring replacement

I am looking to replace my Tiagra fc4400 52t chainring, however it seems to be out of stock everywhere. Based on the parameters (130BCD, 52t) I found a few alternatives, however all of them are 10 ...
2
votes
0answers
65 views

Can you identify this Sachs hub?

I recently picked this up along with a couple of old wheels. I don't know it's age or history. I've only got as far as identifying it as a Sachs. There are no other markings apart from the logo ...
2
votes
0answers
176 views

Help identifying MTB frame

Apologies making ANOTHER one of these threads...Anyhows: Bought a bike third hand, frame has been stripped and painted. Trying to find make & model so I can get some offset bushings for the shock. ...
2
votes
0answers
71 views

Motobecane Sprint Retro Fixie

Question for rebicycling a Motobecane Sprint Blue. I have a desire to rebicycle this Motobecane Sprint into a semi retro style with the orginal theme. In short i would like to purchase the same ...
2
votes
0answers
230 views

Size advice needed for Revolution Country Traveller touring bike

I'm about to by my first touring bike. I've got a very tight budget so I will probably order a Revolution Country Traveller from Edinburgh bicycle cooperation as it looks like it will suit my needs. ...
2
votes
0answers
786 views

Why does coaster brake hub growl when coasting but not when braking or pedaling?

I have an old two-seater recumbent trike with coaster brakes. One of the rear hubs rumbles terribly when the bike is coasting. When the brake is on, or when pedaling, it doesn't make a noise. I assume ...
2
votes
0answers
392 views

Serial numbers on bottom of a pedal crank housing from a 50s era Schwinn?

Can someone please explain what these three numbers mean on the pedal crank housing? I believe this to be the pedal crank housing from a 1956 Spitfire Ladies Bike. The Schwinn Serial reads M0D502 (...
2
votes
0answers
409 views

Does this abandoned 1976 Murray Alpine 26 I found have any significance or worth?

So earlier this week behind a local school I discovered something remarkable. Someone had put a old, wrecked women's bicycle in a pond. The wheels toast, the chain rings are useless, rust in many ...
1
vote
0answers
44 views

Bicycle tire date decode

I bought a new bike for my 3 year-old. 12.5 inch tires, "yida" seems to be the brand name. My earlier research suggests that some bike tires have date codes, in the form of circles with an x in it, ...
1
vote
0answers
55 views

What kind of brake pads to use on carbon fiber road wheels from chinese manufacturer with basalt braking surface?

I am testing out some carbon road wheels and i want to make sure i use something safe. details of the wheels if it matters: 50mm clincher 23mm width 14mm brake line basalt surface DT350s hubs ...
1
vote
0answers
48 views

Hydraulic Disc Brake Pad Replacement

I have AVID Juicy Brake pads, the time has come to replace the front pads. The old pads are very worn. The new ones have lots of "pad" compared to the old ones, of course. I've tried to install the ...
1
vote
0answers
38 views

How to remove old kickstand

I'm trying to cannibalize an old bike but am having trouble removing the kickstand: I've tried screwing the bolt counter-clockwise†, which indeed made it looser, but it's not getting loose enough ...
1
vote
0answers
32 views

Fender/mudguard that detaches with front wheel, is there such a thing?

I have a Carrera Tanneri Cyclocross Bike identical to this one with 700 x 35c wheels. I got some mudguards with it that were a bit too wide so I changed them for some generic plastic ones that ...
1
vote
0answers
45 views

Shimano Nexus 3 coaster brake screeching sound

When I brake hard/er with my Shimano Nexus 3 coaster brake it makes a loud screeching sound. Like really loud, everybody on the street would hear it and turn around. Since I know it's all internal all ...
1
vote
0answers
64 views

Shifting problems after removing and replacing rear wheel

I had a mysterious flat tire on my rear wheel after I had left the bike standing for the workday. I removed the wheel and changed the inner tube. I didn't think anything went wrong while doing that (e....
1
vote
0answers
26 views

Bike rack or similar storage options for child's bike (16" wheels)

My 4 year old has taken to riding with abandon, and we're starting to get into summer, where we hope to do some trails together. I have a rear wheel bike rack which is sufficient for storage of what ...
1
vote
0answers
49 views

Difference between Campagnolo quick release skewers

All, There are several models of Campagnolo road quick release skewers, including the Type 20, Type 40, Khamsin, Record, and Bora/Hyperion/Bullet models. The price differences between the models ...
1
vote
0answers
22 views

Exceptions to 3/8x24 for coaster axle threads?

Is there such a thing as a contemporary coaster hub that uses 10x1 or 3/8x26? Trying to figure something out without the bike in front of me.
1
vote
0answers
32 views

650b for small rider?

I'm considering getting a bike for my friend; she is interested in riding road/gravel with me, doesn't own a bike of her own, and doesn't know too much about what's available. She is about 5 feet ...
1
vote
0answers
51 views

New front fork on old Cannondale XR800

I have an old 2000 Cannondale XR800 (CAAD3?) that I want to upgrade with a non-suspension, disk-brake compatible front fork. Something like this. But what fork to buy? Anything I should know about ...
1
vote
0answers
41 views

RevoShift doesn't move cable between 6 and 7

I have a Shimano RevoShift 7 speed (indexed), that has trouble shifting between 6 and 7th gear. I disconnected the cable for a test, and I see that for the other gears, each click moves the cable ...
1
vote
0answers
42 views

Chain vs seatstay with a 50T Chainring - BMX frame

I plan to put a 50T chainring on my bmx but I am afraid to have an interference between the chain and the frame. Does anybody know what is the critical distance between the seatstay and the chain so ...
1
vote
0answers
74 views

How to fit 10 speed cassette on this hub

I bought a pair of Mach 1 wheels from PlanetX that said the hub was compatible with Shimano 8/9/10 speed. When I tried to install my 10 speed Tiagra 4700 cassette it doesn't seem to go down far enough ...
1
vote
0answers
186 views

clarks m2 hydraulic disc brake problem

I bought a pair of Clarks m2 Hydraulic disc brakes, pre-bled, and installed them on my bike. The rear brake worked great, good stopping power, but the front feels more like the mechanical disc brake ...
1
vote
0answers
59 views

can't remove bike from ascent trainer

I've used the Ascent fluid trainer for a few years now. My bike is stuck on the trainer. I've applied WD-40. When I turn the adjustment knob, the rear wheel isn't being released. Any ideas? Please ...
1
vote
0answers
52 views

Chain comes off full suspension 20" folding bike during casual rides- not derailleur issue

I have just acquired a like-new (ridden 3 times) 20" folding generic full suspension bike- front fork enclosed springs and rear coil spring/piston with tension adjustments by locking plate screw on ...
1
vote
0answers
81 views

Help with Trek Mountain Bike to Touring Bike Conversion

Besides riding bikes since I was a kid, I'm a newbie when it comes to the mechanics of a bike. Hoping to convert a Trek Mountain Bike (that was given to me) to a bike that I can use for long distance ...
1
vote
0answers
42 views

Cybex Recumbent exercise bike clicks on left side of wheel/pedal

I just got a used Cybex recumbent bike. For the first 3 weeks it worked perfect. Then out of the blue the left pedal started clicking as I bring my foot around and up. It starts after using it for a ...
1
vote
0answers
28 views

Repairing older Cycleops Mag trainer

I have an older cycleops Mag trainer which has started to make a clicking noise when the tire is engaged. Is it possible to repair this?
1
vote
0answers
28 views

early 1993 Trex 4200 aluminum frame

Im having a problem with my bottom bracket fitting my bearing cups and axle.I have 68mm tapperd thread Suntour XC pro 124mm axle .I tighten up the cups and the axle still has a lot of Play .SO I ...

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