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10
votes
1answer
504 views

What's this? Photo of bicycle with pedals by the rear wheel

I just stumbled upon this photo of what appears to be a reasonably normal citybike, except it looks like it has a second set of pedals at the rear wheel. source Anybody knows what it is?
5
votes
1answer
2k views

Rear dropout adjustment screws on fixed-gear conversion

I have a Surly Cross-check that I absolutely love and adore to pieces. I've also converted it from a geared bike to a fixie and am wondering if I still need the adjustment screws (see picture, in case ...
4
votes
1answer
196 views

Dismounting/mounting the back wheel on a “Eurobike”

My son has a "Eurobike" (hybrid/"comfort" bike with Nuvinci variable speed rear hub and fully-enclosed chainline). He broke a spoke (which is another discussion) and since the spoke broke at the ...
3
votes
2answers
2k views

How to take apart this rear BMX hub?

As shown in the photo, what tool do I need to take this rear hub apart? I assume I need a tool which will fit in the 4 notches. The problem I am trying to fix is that if you pedal, the rear cog spins ...
3
votes
1answer
316 views

Rear derailleur hits spokes when switching to largest sprocket

I accidentally ran a bungee strap through my old rear deraileur and it tore it apart. I have fitted an identical replacement but cannot work out how to adjust it so that the tension pulley does not ...
3
votes
3answers
1k views

Rear wheel sliding/slipping on turns?

When I take turns, my rear wheel is sliding to the outside of the turn. I'm riding a 2012 Norco Heart, brand new stock tires, single-speed. I'm not carrying much weight, or taking turns too tightly. ...
3
votes
2answers
512 views

Broken rear axle. Why does it happen and is it worth trying to repair?

So I'm taking the time during the holidays to overhaul my commuter bike. The whole drivetrain was full of old oil, road salt and grime so I decided to take the whole thing apart starting with the back ...
3
votes
1answer
325 views

smallest cog of cassette rubbing on seatstay

I built up a NOS late 90s steel frame with a similar era Campagnolo Chorus 9 speed groupset. Has gone well, except the stays/dropouts don't seem to quite like a 9 speed cassette. The second smallest ...
3
votes
1answer
93 views

Just found a vintage Sears & Roebuck 'Ted Williams' Free Spirit 3 wheeler. Can I modernize it?

It's been in my girlfriends back yard for years and I'm under the impression that it's a pretty uncommon bike because I can't find any information on it. Her stepfather spray painted a camo pattern on ...
2
votes
2answers
148 views

Need some experienced eyes on removing cog/rear wheel mechanism

I've looked all over the net and can't find the proper tool or D.I.Y tool to take this apart. It's a single speed (with a ratcheting mechanism), and I'm trying to take it apart to make it a fixie. In ...
2
votes
3answers
132 views

Wheel bust after 10 months, is this normal / usually covered by warranty?

Not sure if this is the right place to ask... I bought new bike about 10 months ago. The past few weeks I've had no end of trouble with the rear wheel (Mavic Aksium) in regards to spokes. About 4-5 ...
2
votes
2answers
109 views

Direction of chain whip

Is there an easy way of working out which way round to apply a chain whip to a cassette for its removal? I've taken plenty of them off in my time but always end up having a couple of tries at it ...
2
votes
1answer
137 views

I broke my rear axle, apparently it's an old style. Is it easily replaceable?

My rear axle broke so I took my bike into a shop to see what they suggested. I had read a few posts that had said it should be fairly easy to replace the axle. The guys in the shop said that because ...
2
votes
1answer
135 views

Aero spokes strength on a family bicycle

I am building a new wheel for my family bike: there will be a kid seat on the back rack over the wheel. I picked up some cheap double butted flat aero spokes (not elliptical but flat). From reading ...
2
votes
1answer
134 views

Older Motobecane conversion

I recently acquired an older blue Motobecane Mirage with a great frame and paint. I have stripped it all down and salvaged everything I can (frame, front wheel, handlebars, front brake) but now I'm ...
2
votes
1answer
145 views

Roadmaster Chromium Edition rear wheel falls off

I've not really maintained a bike since I was young (loooong time ago) and just got one second hand but the rear wheel slips off on hard uphill rides? Im sure its something simple so sorry if its a ...
2
votes
4answers
165 views

How often should I check rear derailleur adjustments?

If I remove the (rattling)plastic disc - How often should I check the limit screws on rear derailleur? If the shifter cable tension is less than optimal, would this be a possible cause to drive ...
2
votes
1answer
320 views

Squeaky rear wheel when rotating

I had my bike on a stand yesterday and decided to check the rear wheel for any issues. I then noticed this squeaking noise coming from the rear hub. It happens regardless of whether I am pedalling or ...
1
vote
1answer
85 views

Funky Rear Axle. Need help Identifying

I recently bought a Globe Work 2, and I'm digging it, but I'm at a loss for what is going on with my rear axle. I took a couple of pics (below), so I'm hoping someone can tell me what I've got. ...
1
vote
1answer
114 views

Rear wheel wobbles

my rear wheel wobbles while it spins, like in this video. I read in the comments that it could simply be a badly mounted tire. What's your advice on this, what should I do?
1
vote
2answers
400 views

Why does the rear hub (cassette) moves on the axle when I pedal?

I am new to this website. I am also new to the terms, and names related to bicycle components. I have a bicycle called a Burner SuperCycle. I went to the repair shop twice in the last year because ...
1
vote
1answer
310 views

Can I replace a 1/2 inch bolt with a 14mm one to secure my axle?

My front wheel is secured with 14mm bolts, while my rear wheel uses 1/2 inch bolts. Turns out my multitool has only a 14mm wrench, so I can't change the rear tire with it. Rather than carrying ...
0
votes
3answers
85 views

Rear hub for randonneuring - any “classic” model?

I have recently had a failure in my rear-hub during a brevet. The bike I use for brevets was assembled from used parts, and I tried to choose components that are dedicated to randonneuring ...
0
votes
0answers
88 views

wheel does not turn when pedaling on mongoose motivator

on a mongoose motivator, when I spin the pedals the wheel does not engage. I removed the cahin, lubricated, still does not work