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10
votes
2answers
1k views

Frame with bottle cage boss ripped out - how serious is the damage?

I'm a huge fan of Greg Lemond so naturally when this frame showed up in my local Facebook page with just the frame and headset, no fork. I got very excited. The seller says that the bottle cage boss ...
2
votes
3answers
143 views

Crack in frame near forks

This is a Raleigh 06 grand prix. I've been trying to find a stem that gives me reasonable comfort. I ran a stem that didn't have the proper spacing and rode it a while observing a knocking sound with ...
1
vote
3answers
95 views

Can these shifters be fixed? Scratches?

I got into an accident where my handlebars got bent. They are very firm and do not seem to budge with force, but I'm a small guy. Can they be fixed? Can I do it myself? What tools would I need? How ...
1
vote
3answers
90 views

Stripped threads on left crank on the first ride

I just purchased a new road bike and had a friend assist me in the assembly. There must have been a problem because it fell off after only 2 miles of riding for the very first time. I used a pedal ...
4
votes
2answers
119 views

Have I damaged my tyres?

I noticed after mounting some new tyres that part of the side wall, just above the bead, seems to have been damaged while I was fitting them (see photos below). These tyres were especially difficult ...
3
votes
1answer
75 views

Replaced left crank arm but still comes loose?

A few weeks ago I bought a new (albeit cheap) self assembly bike from a local store, this bike to be exact http://tinyurl.com/gw77p9t . After about two weeks use (one and a half hours of cycling on ...
3
votes
3answers
125 views

Will using this kind of parking rack damage the wheel?

In Copenhagen, there are many of these parking racks (as shown in the picture), usually people (like me) will just slip the front wheel in and lock the bike. After using them for a while, I happen to ...
2
votes
1answer
70 views

What caused play in my freehub?

I was getting my road bike out earlier and heard a clunking sound when I dropped the back wheel. I repacked the bearings in it ~200 miles ago, and the wobble felt like bearing play. However when I ...
0
votes
1answer
91 views

Does a slightly untrued wheel damage the wheels? [duplicate]

My wheels are slightly out of true, about 1.5 mm at worst part. It doesn't bother me when riding and I don't feel it, but will this hurt or damage the wheel if I keep going on, or should I keep going ...
2
votes
3answers
9k views

Why is my freewheel slipping?

My freewheel tarted slipping this week. It slips most from a stop with no pressure snapping to significant pressure on the pedals. Slipping may be the wrong term as it really isn't engaging. Once it "...
2
votes
3answers
439 views

Seatpost Overextension

I've been riding with my very short seat post extended well past its maximum extension line for quite a while now. Looking at the seat post itself I don't see any signs of deformation or damage other ...
0
votes
2answers
101 views

Small concavities on rims

Recently bought a pair of used zipp 808 clinchers and was a bit disappointed when after a closer look discovered a couple of small concavities (something like 1mm in diameter) on outer side of the ...
11
votes
4answers
14k views

How can I tell a bike is safe after a crash?

I was recently in an accident where a car pulled out on me. I hit the car around the front wheel and me and the bike went over the bonnet and landed on the road, the other side of the car. I was ...
0
votes
4answers
243 views

How much of a bruising can a MTB take?

I recently purchased my first MTB, a Rockrider 560, and I'm curious to know how much a roughing up can it take? For example, can I ride up and off kerbs without wrecking the tires? What about bunny ...
3
votes
2answers
206 views

Roof-top bike rack crash [closed]

Over the week-end my bike suffered a bike crash while on a roof-top rack. On a whim, the driver decided to go through an underground parking lot, everything happened so fast, I did not have time to ...
5
votes
5answers
3k views

Can chain-slap cause damage to a chainstay that is beyond superficial?

Yesterday a coworker insisted electrical tape on his chainstay was necessary, as "[he] gets so much chain slap [he's] literally snapped frames". Now there's a couple dubious aspects to this--but my ...
0
votes
1answer
66 views

Can an untrue wheel cause up down jerks?

I've noticed during a ride that the back wheel was giving me unpleasant up-down kicks (sort of like a weight was added on a section of the rim). I realised later that it had maybe 2-3 mm of left right ...
2
votes
1answer
333 views

Continuing to use damaged cones in rear hub?

I've read in many different places that if you take a hub apart and see damage on the cups, cones, or bearings (may god have mercy on you if your cups are damaged) That they must be replaced. I ...
0
votes
2answers
558 views

Is there a device for protecting your carbon-soled road shoes from the cleats?

I recently came across this product:, which is a stainless steel shield to place between your mountain cleats and your carbon soled shoes, to prevent damage to the carbon. Has anyone seen something ...
1
vote
4answers
747 views

Damaged (scraped) tire - what to do?

First of all, I am either inexperienced or very lucky because I have never had a flat bike tire in my life. Now comes the question. I have a basic "Specialized Sirrus 2013" hybrid bike which has run ...
4
votes
1answer
904 views

Can i stop my frame scratching my seatpost?

I have an On-One Scandal aluminium frame, into which i have put a carbon seatpost. I have been adjusting it to find the right height, and i have noticed that it is getting seriously scratched - see a ...
2
votes
2answers
217 views

Suitable remedy for chain damaged by bike shop

I've got a fairly old Dawes Discovery 301 (not sure of the year); earlier today I took it to a shop to have a replacement bottom bracket fitted. I rode it 2 miles home, and noticed a slight ...
6
votes
1answer
4k views

Fixing damage to brake rim surface

somehow the alloy braking surface of my rear wheel's rim has got a series of quite shallow lacerations, less than a mil' deep bunched quite closely together (the effected area is no more than 1/8 of ...
4
votes
2answers
1k views

Crank arm snapped: what could have caused it?

Recently, on my single-speed bike, the right crank arm just snapped. Was slowly going up a hill, and all of a sudden it broke in two pieces. I have now exchanged the entire crank & chain set (...
1
vote
1answer
541 views

May I ignore the frame damage (or should I get a budget carbon frame)

I was happily using my Canonndale F5 Hardtail to commute to work and other places (like shopping, going to a swimming pool and the like) until recently I had a very unfortunate accident with a car. To ...
5
votes
2answers
482 views

Carbon cranks care?

I have carbon cranks (SRAM S-2200) on a new bike. The side is quite protected but the bottom part, where the pedals are fitted, is not. Hitting rocks on the bumpy road is sometimes inevitable. How ...
1
vote
1answer
653 views

Repairing a Crimped Titanium Frame

I have a Van Nicholas Astraeus Titanium bike, and recently had problems with removing the seatpost. The aluminium shim oxidised itself to my frame. I took it to the bike shop, and in our efforts they ...
0
votes
0answers
95 views

How can I prevent “chain suck”? [duplicate]

I know what the above is: when your chain bunches when you change gears & the bunch runs through the front derailleur and wrenches it. This damage is pretty much irreparable, and has cost me far ...
6
votes
3answers
3k views

How can I determine whether rust has made my bike unsafe?

I ride a 1972 steel frame bike year round through Canadian winters. When I got the bike it was in good shape, but after putting a few thousand km worth of commuting on it, it has a lot of scratches ...
5
votes
2answers
219 views

Is this rim safe?

The rim has a parting at the join: This is a brand new wheel, and I was wondering if this is a safe one. Could it split at the join?
3
votes
1answer
258 views

Checking fixie for damage

This morning during my morning commute I had an unintended lesson in fixie skidding: I dropped the chain, it got stuck between the cog and the hub and locked the wheel. I'm not sure where that skill ...
1
vote
1answer
208 views

How bad is this damaged lug

I have noticed a little crack in one of the lugs of my gazelle steel frame. I hav not ridden it since, because I am worried it will break. Here are some pictures. The lug in question is the one ...
4
votes
2answers
2k views

Dealing with a scrape (cleaning a wound)? [closed]

A couple weeks ago I bought a new road bike for commuting to work with. Part of the commute is along the beach bike path, so there's usually some sand on it. Last week my tires slipped on the sand and ...
5
votes
3answers
1k views

How bad is this broken brake cable strand?

I just bought a new bicycle. While I was fiddling with things (removing tags, mounting a light, etc.) I noticed that the boot on the rear brake cable was loose. When trying to reseat it, I found that ...
6
votes
4answers
800 views

Which parts of a wrecked bike would be OK to use or sell?

A few months ago I was in an accident with a car on my way home from work (oncoming car turned left in front of me). My bike was severely damaged, the frame broke in two and the front wheel is bent ...
4
votes
1answer
1k views

Will I damage anything by not replacing my clicking bottom bracket?

I have a Specialized 2010 Sirrus Sport with a sealed cartridge square taper bottom bracket that makes a clicking noise. If I don't have it replaced, will I be harming anything apart from the bottom ...
3
votes
2answers
1k views

Repair superficial damage to a carbon frame

I have a carbon frame with an integrated seatpost. The saddle sits on a clamp that is meant to secure the saddle on the seatpost and NOT hold the weight of the rider too. I went on a ride and my knees ...
4
votes
1answer
1k views

How worrying is damage to a carbon fiber frame near the bottom bracket?

Last week on a ride my chain popped off the inner chainring and managed to get stuck between the chainring and frame. I (probably foolishly) tried to work it free by yanking on the chain and that ...
4
votes
1answer
1k views

How do I fix a dent on my frame?

I suspect that something has pierced my frame. At any rate, I have a dent in my bike frame. I would like to avoid the possibility of corrosion, with minimium cosmetic trade off. So, how do I go about ...