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1 vote
0 answers
15 views

Rear wheel is loose, but only at a specific place

My rear wheel has some loose, but only at a specific place/angle on the wheel. That means that the wheel is tight everywhere, except for a zone of about 30 degrees, where it's loose. It's a quick ...
  • 11
1 vote
1 answer
25 views

Is it possible to use brake levers with large-diameter fittings on a smaller-diameter handlebar?

I bought brake levers meant for 31.8mm handlebars (namely Tektro RL721, meant for cyclocross) some weeks ago, meaning to use them for a bike build which has a 20-something millimeter bullhorn ...
4 votes
2 answers
573 views

Non-drive side crank arm rubbing chainstay, can I file it down?

What you're looking at is a Non-drive side crank making contact with the chainstay. Drive-side has plenty of clearance. Components involved: Cranks: LDC 155mm square taper BB: 108mm Box One Ti. ...
3 votes
1 answer
54 views

Need help reassembling bike shifter

I recently needed to change my shifter cable, and I ended up taking apart the entire shifter instead of doing it the easy way. I was able to change the cable, but couldn't put it back together again. ...
1 vote
1 answer
62 views

Are racquets' graphite the same substance as bike frames' carbon?

One of the materials used for tennis/squash/pickleball/... racquets is graphite. One of the materials used for bike frames (and components) is carbon. I gather that both have the element Carbon in ...
  • 6,237
2 votes
0 answers
25 views

What tool(s) are required to remove a Rohloff Sprocket?

To remove the Rohloff sprocket I need Sprocket Removal Tool Do I also need the lock ring tool ? If not, what is the lock ring tool required for?
1 vote
2 answers
70 views

Australia: I'd love to build a budget urban bike on a budget, where can I find parts like frames and wheels at prices comparable to bike shop builds? [closed]

I would love to own a low maintenance functionality/comfort focused bike. I am thinking: 8 speed internal hub belt driven relaxed geometry touring/cruiser handlebars pannier rack aluminium frame ...
3 votes
3 answers
391 views

Fixing oval rim?

I have single wall rim that is bent inward about 3mm on the areas marked with red. Is there a way to fix it? How I go about it? It's a cheap bike; I don't want to invest more money into new rim, and I ...
  • 494
0 votes
0 answers
48 views

I need to know what logo is on this pair of BMX forks

I need to know the logo on this pair of BMX sports that looks like NC or possibly could be CC I'm not sure but if anybody could help me I'd really appreciate it and I hope this submits faster than ...
1 vote
0 answers
24 views

Bosch Performance No charge?

Hi I have a 2017 Bosch equipped Cannondale Cointreau e it's the performance class 3 Bosch Drive. 500 battery. I'm getting 5 volts at the charger 120 volts going into the charger 5 volts on the output. ...
0 votes
0 answers
49 views

Tire and tube keep popping off of the rim

It's the third time now that the tire just pops off my rim, and then the tube blows up as a result. This is all within the span of six months on a brand new bike assembled by a supposedly high-end ...
5 votes
1 answer
52 views

Loud clunk moving to smallest sprocket

When I shift gears to the smallest sprocket it makes a very loud clunk sound. There's also a lot of movement in the chain, like a bounce. I've taken a video demonstrating this Video of clunk I'm ...
2 votes
0 answers
20 views

U.S. source for Alfine 11 oil for oil changes?

Yesterday I changed the oil in my Alfine 11-speed hub. I bought the 50ml bottle of SG-S700 from an eBay seller in Florida, the last one in the site's search results originating from the United States. ...
1 vote
0 answers
57 views

Fixie bike crank/pedals give in when back pedalling

Recently was given a fixie, but with braking issues. Whenever I back pedal (as in lock up and stop pedalling completely), the crank/pedal seems to give in and not stop the rear wheel from moving ...
4 votes
1 answer
67 views

Use 2mm washers for the spoke nipples inside rim?

Changing the spokes in the wheel, bought 265mm spokes instead of 264mm and they are too loose. Now i have two options: Have spokes stick out of the spoke nipples 1-2mm into the rim which is withing ...
  • 494
2 votes
1 answer
44 views

How to fix loose valve?

I was pumping my tires when a valve pushed in, deflating the tire in the process. It pushes in and out, but won't stay in place. I'm not really into biking so I'm completely clueless
  • 21
1 vote
1 answer
78 views

Why can rear bike wheel move forward when braked

Sorry for question language. This is a phenomena that I observed. I was on a stationery bicycle and applied the rear brakes. When I tried to move backwards, the bike won't budge. But when I tried to ...
3 votes
1 answer
241 views

Rear derailleur compatibility for friction shifting

I have a mid-1980s road bike with downtube friction shifters. I'd like to install a freewheel with a larger cog (something like 32 or 34T), but my current rear derailleur won't accommodate that. So I'...
3 votes
2 answers
296 views

What trainer thru axle should I buy for my bike?

I have Tacx Boost trainer and axle that came with the trainer is too short (cannot put the nut on the drive side as it's just too short). Axle on my current bike (Trek Emonda SL5) is seen in the first ...
2 votes
1 answer
57 views

Specs to take into account when changing frame on Enduro MTB

The frame of my Enduro MTB is cracked and needs changing. The bike is 10 years old so I will look for a second hand frame and I'd like to be able to use as many of my current parts as possible. What ...
  • 123
0 votes
0 answers
64 views

Trying to find out what kind bike I have [closed]

What kind of bike do I have serial number snfsd13l41653
3 votes
4 answers
742 views

7 or 8 speed cassette?

I'm riding a Schwinn GTX 2 and using it to learn things on. I am new to fixing newer bikes. I've changed to Altus front and rear derailleurs. Now I'm about to put on a gearset of the same. I've got ...
0 votes
1 answer
97 views

Is there a brand of bicycle named BUILD

A bicycle had passed my home today rather quickly. The frame had the word 'Build' painted on it. I am assuming it is an electric bicycle, but I would like to know more about this bike. Is 'Build' the ...
2 votes
2 answers
71 views

Bianchi 2nd hand bike information

I bought this bike 2nd hand and I would like to find out more information about it, but cannot find it in the Bianchi catalogues. Might someone be able to give me some guidance? I know it is a Bianchi ...
11 votes
2 answers
1k views

How are bike mechanics trained and recruited?

Sorry if this question isn't sufficiently bicycle specific, however I thought this board could lend some insight! I'm recruiting at a community bicycle shop, and I'm increasingly curious as to how ...
  • 1,386
2 votes
2 answers
110 views

How can I identify this Bianchi model?

I bought this bike 2nd hand and I'm looking to sell it, but would like to find out more info on it e.g the model number (it's C2C) Would anyone be able to offer some guidance and maybe an idea of the ...
  • 21
0 votes
1 answer
43 views

Geometry equivalence between Giant Contend 2 and Fuji Feather

I have been using a Giant Contend 2 for over 2 years and I am really comfortable with its geometry. Now, I want to purchase online a Fuji Feather, with a similar fit, but I got a bit confused with ...
  • 157
2 votes
1 answer
113 views

Shimano hydraulic brakes underperforming - water fixes the issue

I have a Shimano XT BR8100 system, all was good until I did some maintenance. Probably I did something wrong, trying to understand what. Did a normal procedure to replace oil and pump out air. Visible ...
  • 141
4 votes
1 answer
107 views

Does the "speed" of a 1x chainring really matter?

I currently have a 1x8 setup on my bike, and am considering upgrading the cassette to an 11-speed. I've also been looking at replacement chainrings as I've seen that they also come in 8-speed, 11-...
4 votes
1 answer
140 views

Tandem bipod stand

We recently got a Simmonsohn Trohnheim tandem bike. I want to add a bipod kickstand to it, but I am unsure where it must go: the front or rear crank hub? Also, can anyone recommend sturdy bipod ...
  • 191
6 votes
1 answer
55 views

Misaligned Carbon Rails on Brooks C13 Saddle not aligning to Seat Post Clamp

I have a [VNT Elements Seat Post] (https://shop.vannicholas.com/en/products/vnt-elements-accessories/VNT-Seatpost-Alloy-16-7mm-Setback/11326). This saddle has two bolts at the back and clamps onto the ...
25 votes
4 answers
3k views

How to tell when it's time to give up on tires?

I work at a community organization that receives a lot of donations, including tires, in various condition. We inspect tires for obvious damage and wear, and signs of aging like hardening or cracking. ...
  • 1,386
1 vote
1 answer
103 views

Can you confirm that inner plates mate with thin teeth?

On one manufacturer's website, I see the following image of a 1x chainring. The chainring has alternating thin-thick teeth. Here the chain's outer plates sit on the narrow (thin) teeth. One another ...
  • 6,237
0 votes
1 answer
56 views

Safely seating tyre beads during seasonal installations

What's your best idea for avoiding this elementary mistake? I did not inspect the bead carefully after installing these winter tyres. Sure enough, on a subsequent inflation, and when the contact area ...
  • 6,237
2 votes
2 answers
105 views

1x12 chain stability on chainring

Aside (Trivia #1): The concept of offset just crept into the standard chainring jargon. When were chainrings with offset introduced? Context: Traditionally the teeth of a chainring were on the same ...
  • 6,237
3 votes
0 answers
103 views

What kind of cutting wheels cut hardened U-lock shackles best?

I have a question which might be asked by honest people wanting to protect their bike from thieves, but unfortunately can also be asked by bike thieves. I hope this won't be downvoted, my intentions ...
  • 14k
3 votes
3 answers
145 views

Where/how do I reduce travel on my brake levers?

How do I reduce travel my brake lever? (To brake currently, I practically have to depress it all the way to the handle bar.) I don't see any place to put an allen wrench anywhere. What am I missing?
  • 197
2 votes
1 answer
52 views

Help identifying a 1990's Panasonic(?) / Colnago(?) road/aero/speed bike from a German TV series

In 1992, "Freunde fürs Leben" (friends for life), a German TV series, began airing in which one of the protagonists, a doctor, was always carrying around his high-end luxury bike for fear of ...
0 votes
0 answers
18 views

Crank set sprocket and rear sprocket not exactly aligned (internally-geared-hub)

I ride a Bike Friday Pocket Llama with a Rohloff internal gear hub. I noticed that the crank set and the rear sprocket are not exactly aligned in a straight line. As the Rohloff internal gear hub will ...
  • 1,286
1 vote
2 answers
60 views

Torque Specification for Brooks C13 Saddle with Carbon Rails

I wanted to know what the torque specification for this saddle (Brooks C13) would be. There is no torque spec/limit information on the Brooks website for this saddle. The concern is that the rails are ...
0 votes
0 answers
42 views

Bicycle helmet camera for long recording and charging simultaneously

I am using Mobius action cam 2014 model mounted on my bicycle helmet for recording my journeys. My long trips usually last 8 to 10 hours and this camera can record non-stop for that duration, as it ...
9 votes
5 answers
3k views

How important is to have many gears on a e-bike?

I am planning to buy an e-bike and I have been wondering what’s the right thing to choose between: 1 X 8 traction, 29”, 36V • 16Ah → 576Wh battery, or 3 X 9 traction, 27.5”, 36V • 10.4 Ah → 374Wh ...
0 votes
2 answers
80 views

Popping sound source

I have a mountain bike and when I am pedaling, it produces an annoying popping(creak) sound. Any ideas for the source? The sound comes from the area shown in the picture. Here is a sound file with ...
  • 779
2 votes
1 answer
243 views

bike identification help to buy

I'm trying to find this base model of the bike, someone is selling this one with a Bafang kit.
  • 21
11 votes
3 answers
2k views

Can I update a decade-old mountain bike to modern standards?

About ten years ago, I built myself a new bike, for general utility riding and some light trips through the countryside (tens of miles on towpaths etc). I was most familiar with the classic (hardtail) ...
8 votes
3 answers
1k views

Were older bikes generally longer?

Tl;dr: Were bicycle frames in the mid-20th century generally longer than today? This post asked about the length of a Soviet bike from the 1980s. The frame is longer than that of a contemporary bike ...
2 votes
4 answers
1k views

Can I replace 26 inch tires with 29 inch tires on my Giant Sedona?

The reason I am asking this question is I have pre-ordered a "Switch e-bike Conversion Kit for my new Huffy Rock Creek Mountain Bike that has 29 inch tires. The Swytch system will ship with a ...
1 vote
1 answer
102 views

Why has my derailleur reposition itself so that its out of place?

I have a 2004 Trek Navigator I'm trying to fix up. Everything seemed fine until I switched gears and heard loud odd noise plus my pedaling got alot harder. Upon inspection I found my rear derailleur ...
  • 163
0 votes
0 answers
64 views

i am 130kg(286lbs) is mtb okay for me? [duplicate]

I have Hero howler single speed 27.5T cycle I am 130kg now. Can I ride this MTB cycle and I won't face any issues? I am thrilled as the cycle will able to take my weight or not as I am obese so ...
6 votes
3 answers
396 views

Crank-based Power Meter for Shimano Sora

I am a junior amateur cyclist and I have a road bike with a Shimano Sora groupset (shifters, crank, front and rear derailleur, cassette). I am looking to step up my cycling to the next level and have ...

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