8
votes
2answers
408 views

Teaching an adult to ride

My friend wants to learn to ride, and I've got a road bike that fits him reasonably. He's willing to buy a helmet, but not a trike or anything like that. My plan was to put the seat low and have him ...
15
votes
4answers
3k views

I've had a bike in storage for over 10 years. What maintenance does it need?

I've had a bike in indoor storage (my garage) for over 10 years. I'd like to get it back into good condition to use for my commute to/from work each day. What things should I check/replace before I ...
-4
votes
5answers
6k views

Radon bikes - has anyone heard of them? [closed]

I am interested in purchasing my first road bike. Specifically the Radon R1 4.0 or the Radon RPS. Does anyone have any experience wit these bikes? There are a few tests on-line but unfortunately I ...
1
vote
1answer
1k views

Genesis Onyx 29" New tires? New wheels?

I want replacement tires for this bike. I believe they are 29" x 2.125. Can I buy tires that are more narrow for the same rim/wheel? 2" 1.75? Also, Is it possible/practical to swap the wheels ...
2
votes
4answers
540 views

Do higher speed crashes result in less serious injuries.

I have heard that the severity of injuries tend to decrease while riding a road bike at high speed. An instance of high speed would be like those in the Tour de France. The reasoning behind this idea ...
2
votes
3answers
753 views

How exactly are pedals attached to crank arms?

Recently I tried to unscrew the left pedal of a bicycle by turning it counter-clockwise with a spanner lengthened with a piece of pipe. The net result is the spanner broke apart and the pedal is still ...
-1
votes
1answer
462 views

Which is better, single speed or three speed?

Which is better, single speed or three speed? I am 45 and buying an adult trike because I never learned to ride a bike when I was younger. I don't know if I get a single speed or three speed?
3
votes
3answers
2k views

Will a 650x23 tire fit on my 26" rim?

I have an MTB that I have been riding in the city for many years. As such, slick tires suit me well and I have been using a set of 26x1.25 tires for the last 3-5 years but they are starting to show ...
6
votes
4answers
5k views

Unsure of Proper Tire Pressure

I purchased a new bicycle and I'm confused about the tire pressure. The guy at the bicycle shop told me to inflate to at least 100psi. However the bicycle itself has the words 'Maximum inflation - ...
3
votes
4answers
913 views

How does stiffness affect experience and performance?

I see many mountain bike reviews and articles discuss the stiffness of frames, forks, wheels and other components. Here are some questions which cross my mind: What is the definition of stiffness? ...
4
votes
4answers
2k views

What bikes will be used by the competitors in the Mountain Bike Olympics?

I'm just curious to know what bike models and setups will be used by the competitors? Is there any data out there on the web?
4
votes
2answers
1k views

How do I descend faster on the straightaway?

I've heard a lot of advice about descending mountain roads involving cornering and braking. I want to know how to go faster when descending on the long straightaway. Is it worth pedaling at speeds ...
1
vote
2answers
2k views

What kind of pump do I need for this valve?

This is the valve I have on my bike, but my current pump does not work with it. What kind of pump do I need to buy that will work with it?
6
votes
1answer
816 views

I find that I'm always in my highest gear. What options to I have to re-distribute the ratios to a more useful range

I have three gears in the front and 8 in the back, but I always use the highest gear (I live in a flat place) I might drop down one or two gears occationally but this is only a small fraction of the ...
3
votes
3answers
906 views

Armor and helmet for ultra-safe commuting (womens size)?

I'm about to start daily bike commuting again after a long hiatus and want to go all out on safety. My fear of an accident is extreme enough that I am looking into regularly wearing body armor and a ...
16
votes
5answers
5k views

Padded saddle VS padded shorts

Why do cyclists use padded shorts instead of padded saddle? It seems like putting padding on the saddle would be more optimal. Doubly so for triathlon.
2
votes
2answers
4k views

What shifters are compatible with shimano 9-speed?

I haven't ridden in anger since around 2003. I have two bikes which I am trying to return to a roadworthy state. Each has a non-functioning right hand shimano shifter. Racing bike: Ultegra 6500 ...
2
votes
1answer
1k views

Front brake lever will not stay tightened

I have a 2011 Trek Cobia with Hornet brakes. About an hour and a half into my trek through the woods this morning I noticed that (once again) my left brake lever was hitting my knuckle when I fully ...
6
votes
1answer
3k views

How can I adapt a mountain bike for a one or two week tour?

This is the situation. I have GT Agressor 1.0 mountain bike. I want to travel for about a week on my bike, which means that I will have to ride a lot on paved roads (around 70% of the road). So I ...
4
votes
2answers
534 views

Can I zero the gauge on my floor pump

I ordered a zefal husky pump, and it just arrived today. I am pretty excited about it. (Who doesn't get excited about pumps?) The downside is that the gauge is reading ~50psi instead of ~0psi I ...
2
votes
2answers
2k views

What do I need to know when replacing my cassette?

I'm looking to replace the cassette on my bike with a smaller version, as I find I'm only ever using the top ring of my chainring (except once recently during rain-ageddon). What do I need to know ...
2
votes
3answers
4k views

Jammed Giant brand U-Lock. Unable to insert key

The other day I locked my bike to a fence and upon my return about an hour later, I found the lock jammed. I am unable to insert my key fully into the keyhole. My friend suspects that while locking ...
11
votes
4answers
2k views

Would a military helmet make a safe alternative to a bicycle helmet?

I am in need of a new bicycle helmet and have been exploring some alternative options. One possibility I am considering is visiting my local Army Surplus store and getting a helmet there. I only use ...
2
votes
3answers
988 views

Does a typical floor pump have an integrated one-way valve?

In order for a floor pump to work correctly, something has to make sure that when we pull the pump piston up, the air from the tire does not escape back into the pump. For that there should be a ...
2
votes
1answer
394 views

Replacing 30 yr old tires; the new ones don't fit

I pulled an old touring bike (Ross circa 1980) out of the basement and bought new tires for it. Both the old tires and the new tires are labeled 27 x 1 1/4, but the new tires are larger than the old. ...
3
votes
1answer
309 views

Seatpost of a folding bike is always dirty, filed down by frame?

I fold and unfold my Dahon Speed D7 at least four times a day, and each time its seatpost is being pulled up or pushed down the frame tube. Problem is that the seatpost becomes dirty really quickly ...
0
votes
3answers
1k views

any gps improvement on smartphones with barometer?

I know that smartphones gps have problems with their accuracy, especially with altitude. But I heard that the Galaxy Nexus has a barometer that theoretically is used to improve the accuracy of the ...
8
votes
8answers
9k views

Are road tyres suitable for any off-road riding at all?

I'm looking to buy a bike for my commute - 6 miles a day. The commute itself is all on roads, so naturally I'm looking at road bikes. My main worry is that if I invest in such a bike I won't be able ...
3
votes
2answers
455 views

27 inch tires significantly harder to change than 700c

I've got a newer road bike I use for my longer, faster weekend rides (700c tires) and a 70's Sekai that I use to ride with my son, and to run errands (27" tires). I have no problem changing ...
3
votes
2answers
1k views

How do you evaluate a wheelset?

I'd like to upgrade my wheels but beyond the price, I'm not sure how to compare different options or even to tell if a given wheel is an upgrade or a downgrade from my current wheelset. I'm looking ...
1
vote
1answer
1k views

Bicycle slipping gears on middle sprocket gears 4-7

I see lots of questions on gears slipping but not sure it's the same as what I have. Out of 21 gears I only have problems with 4 (middle sprocket (2) on left shifter gears (4-7) on right shifter). ...
17
votes
3answers
2k views

What are the most significant factors affecting downhill cruising speed?

When I'm riding with my friend, I notice that he rolls down hills significantly faster than me. We can be riding next to each other, both in a similar aerodynamic position, but if we both coast he ...
2
votes
1answer
418 views

Front wheel inexplicably misaligned

I have a Civia Bryant which I ride around the city and to work everyday. Yesterday, while walking the bike into my apartment building, I noticed that there were noises coming from the front wheel. ...
0
votes
1answer
113 views

Cramping While Riding [duplicate]

Possible Duplicate: How to Prevent Cramping I get cramps in my feet and calves while riding. I was told eating bananas and taking electrolyte pills would help. Once the cramping starts is ...
7
votes
4answers
6k views

What should a big guy look for when buying a road bike?

I'm 6ft 4" (1.8m) and 22st (139kg). I do a fair bit of cycling, mainly spinning and mountain biking. I would like to get into road riding so I'm looking to buy a road bike. I want to spend between ...
2
votes
2answers
264 views

How to improve front brake functionality?

My front brake (cantilever brakes) does not make contact with the rim until I pull the brake levers almost all the way in, leaving me with very little space to apply extra force. That means the brakes ...
2
votes
3answers
1k views

change derailleur and shifter in an old road bike reconverted to hybrid

I have an old road bike, that I converted to a hybrid bike, I just use it for small tourings. Some time ago I changed the handlebar, the brake levers and the tires. Recently the derailleur broke up, ...
1
vote
2answers
455 views

How do you estimate the speed of Tour de France riders on tv?

I was watching Tour de France with my father (who is a cat 3 racer), and he claimed to be able to estimate how fast the riders were going by observing the cyclist on the screen. I didn't believe him ...
2
votes
1answer
602 views

What do you do when the bus bike rack is full?

Sometimes I take commute via bike, other times on the bus, but I rarely plan on doing both because I worry about the possibility of waiting for a bus only to find that its bike rack is full and having ...
3
votes
3answers
636 views

Which parameters should I track with bicycle computer so I can analyze changes in my riding?

I'm building Arduino-based bicycle computer with GPS at my free time as a hobby project. So I have to find out which parameters of ride will be useful to track to see a progress (or any changes) in ...
3
votes
4answers
325 views

Suggestions on buying a road bike for the city

I'm looking to buy a bike with which to get around Atlanta. My budget is about $500. I've seen lots of suggestions for a fixie but those seem relatively difficult. I plan to ride about 5-10 miles ...
2
votes
2answers
560 views

Rohloff clicking sound with ratchety feeling

Recently, my Rohloff-geared bicycle started to make a regular clicking sound with a ratchety feeling associated with it. Besides a click, I feel a small resistance transmitted through the pedals. This ...
12
votes
4answers
1k views

Deterrents against partial (component) theft

Big question: Is there any way to increase the security of bolted on portions of a bicycle? Specifics: I cycle as my primary mode of transport (in East London) on a early 90s steel road bike with ...
0
votes
1answer
612 views

pedal falling off axis

One of the pedal arms in my bike is loosening off the crank every so often. When it starts to happen, the pedal arm, that has square ends, and the nut will end up detaching from the crank, so I have ...
18
votes
7answers
3k views

Is there such thing as an automatic transmission for bikes?

Has anyone ever designed or manufactured an automatic transmission (or automatic shifter?) for cycling? I imagine such a device would automatically change the gearing to allow the rider to maintain ...
1
vote
1answer
832 views

Brake cable housing doesn't attach to lever

I got a new bike but the front brake doesn't work. I tried reading up about the brake system on line and learned quite a bit (they're cantilever brakes). But I am missing something elementary and ...
7
votes
6answers
3k views

Is it possible to estimate road grade while riding?

It would be nice to be able to estimate the grade of a road while riding, even if the estimate is not completely accurate. With a GPS, in theory it should be possible in theory to ride a short ...
4
votes
3answers
142 views

Were there always teams in road racing?

Did bicycle road racing always have teams? Were the early road races competed by individuals who were racing for themselves? At what point was it realized that having a team would confer huge ...
7
votes
6answers
5k views

Does a 700c wheel help you go faster?

Someone suggested going with a 700c wheel to go faster, and after thinking about it I am wondering if a larger wheel actually does go faster. I understand that your gears will cause a wheel to rotate ...
8
votes
3answers
904 views

Is there any difference between professionally painting a car and a bike frame?

I'm getting ready to purchase a new bike which I love but I hate the color scheme. I can't find any custom bike paint shops in the area. Can I simply take it to a car paint shop and get a ...

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