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Jul
4
comment What is the relationship between tyre pressure and weight?
There is, in general, an inverse relationship between tire pressure and the energy required to move the bike. However, this relationship is quite complicated, and there's nothing like a simple formula that would yield the calculation you want.
Jul
4
comment Knee feeling after long ride with road bike
Just in case it's unclear, "cadence" means the rate at which you turn the pedals, measured in revolutions per minute. A cadence of 60 (which is about the minimum you should ever do when doing serious riding) is one full revolution of the pedals per second. For a young, healthy individual who aspires to be a better cyclist, a cadence of 80-90 is a good target.
Jul
4
comment Knee feeling after long ride with road bike
Pedaling with a "harder" gear can be damaging to the knees, as can riding with your seat too low. The two together is especially bad. A simple rule of thumb for cadence is to pedal at least as fast as you breathe, and try to get your cadence to 2x your respiration rate.
Jul
4
comment Knee feeling after long ride with road bike
Yep, a higher cadence may very well help. The OP's problem sounds like a combo of low cadence and too-low seat position.
Jul
4
comment Used-bike: How much to reserve for repairs/upgrades of total budget?
Depends on how old the bike is and how much wear (and also how obsessive you are). In general I'd figure on replacing the tires and chain, but most garage sale bikes have never been used enough to require a new cluster, eg, or new brake pads (though the old ones may be hardened with age). If the bike has clearly been left in the weather for a long time, don't buy it -- the bearings may be bad, in addition to rust everywhere, jammed shifters, etc.
Jul
3
comment Peculiar feel when pedaling
Sounds like a loose crank arm to me. If so, it's urgent (or perhaps past urgent) that you get it tended to.
Jul
3
comment Why top touring bikes have no suspension forks?
@7thGalaxy -- Correct. I used to get wrist pain when I had a poorly fitting bike (slightly too large for me), but changing the stem helped a lot, and with my new(er), better-fitting bike wrist pain is not a problem (though I certainly get pains elsewhere).
Jul
3
comment Why top touring bikes have no suspension forks?
A suspension fork costs weight, and, more importantly, costs efficiency.
Jul
3
comment How should I transport Cannondale Bad Boy 5 INSIDE a BMW 4 Series Coupe?
@DWGKNZ -- Well, remember that anything in the US more than 50 miles west of the East Coast is the Wild West.
Jul
3
comment How should I transport Cannondale Bad Boy 5 INSIDE a BMW 4 Series Coupe?
@mattnz - I've never heard of anyone being hassled for having the license plate obscured by a bike rack in the US. I'm sure there are a few tight-pantied cops Out East who might do this, but it would be rare.
Jul
3
comment How should I transport Cannondale Bad Boy 5 INSIDE a BMW 4 Series Coupe?
@DWGKNZ - Getting the rear wheel off of a derailleur bike (without breaking the chain) is something many 12-year-olds can do. The trick is to do it without getting grease all over your hands and everything else, and then keep the chain clean and undamaged while being transported. For these reasons removing the rear wheel to transport is unattractive.
Jul
2
comment Schrader tubes in Presta configured Rims?
If you're "on the road" you should be carrying your own pump.
Jul
2
comment How should I transport Cannondale Bad Boy 5 INSIDE a BMW 4 Series Coupe?
One needs to be a little careful when getting a hitch receiver for use with a bike rack. The rack produces a fairly substantial "lever arm", and if the hitch is not totally rigid and secure it can bend or poop off. (And I think $400 is closer to a realistic price to get a hitch receiver installed.)
Jul
2
comment How should I transport Cannondale Bad Boy 5 INSIDE a BMW 4 Series Coupe?
@Blam - The front wheel is using a special axle and doesn't come off readily. Removing the back is messy -- some scheme would have to be developed to control the chain. And removing wheels on disk brake bikes is always a bit touchy.
Jul
2
comment Knee Pain and Injury
The simplest exercise is to lay on your back and do leg lifts, holding your knee completely straight. (Yes, I know that doesn't make sense, but that's what you do.) But you really should be instructed on this and other exercises by a medically-qualified therapist.
Jul
2
comment How should I transport Cannondale Bad Boy 5 INSIDE a BMW 4 Series Coupe?
There's always the bike hanging out of the trunk approach.
Jul
2
comment Slipping when pedalling
What is the "bull bearing"? I'm not familiar with the term.
Jul
1
comment What is the effect of changing length of crank arms?
@Alexander - "Torque" is the measure of angular force. The same pressure applied at the end of a longer lever arm results in more torque, and this translates into more force provided to the wheels.
Jul
1
comment What is the effect of changing length of crank arms?
Obviously, it affects the length of the leg "stroke". Generally, taller people with longer legs would benefit from longer crank arms, though in practice this bit of "tuning" is never done outside of the pro arena. Note that, on a given bike, it also affects ground clearance and cornering ability, and clearance between toe and front wheel while turning.
Jul
1
comment Why has my ride changed?
Since bike tires need to be filled at least weekly, and 2-3 times a week for high-pressure tires, a good bike pump (with gauge) or access to some sort of tire inflation facilities is pretty much mandatory for anyone who does any regular cycling.