Reputation
11,872
Top tag
Next privilege 15,000 Rep.
Protect questions
Badges
7 38 67
Newest
 Enlightened
Impact
~626k people reached

Jan
29
answered Gates Carbon Drive off-road experience?
Jan
29
comment Why is Shimano 105 5700 (10-speed) is more expensive than 105 5800 (11-speed)?
@PeteH When I bought my bike, it had an 8-speed groupset, so I think it already qualified as "out-of-date" before I rode it off the lot. The advantage is that it's dirt cheap to maintain. 8 speed drivetrain parts aren't the lightest you'll find, but you can get some pretty high quality stuff for rather low prices. The fact that cassettes, chainrings, and chains are compatible between manufacturers keeps everybody honest about pricing relative to manufacturing costs.
Jan
28
comment Why is a steady cadence so important? Or is it?
I think the main problem here is that it's relatively easy to maintain 25 km/h on flat level ground using a road bike without actually providing much power to the bike. However, if you want to accelerate up to 35 km/h and then coast down to 15km/h and then repeat, then the acceleration part actually takes quite a bit of effort and will tire you out a lot more than just maintaining 25 km/h in the first place. Plus, your acceleration and deceleration is not linear, meaning you will spend more time closer to 15 km/h than 35 km/h, making the average probably closer to 20 km/h than 25 km/h.
Jan
28
comment early 1993 Trex 4200 aluminum frame
Did you put the axle in the right way around? some of them have an offset to account for the fact that you need a longer axle on the crank side in order to accommodate connecting the chain rings.
Jan
26
answered Can you identify this vintage MTB?
Jan
26
comment Worries about a gear ratio of 1:1?
I guess if it's the easiest gear, you might spend some time in that gear, but I personally wouldn't set up a bike such that I would be in the easiest gear for a significant amount of time. The most extreme gear on either end should not be something you use a lot in most cases because it means that you should probably have a gear or two beyond that one in case the riding gets a little tougher or easier than you would usually encounter.
Jan
25
answered Sensible shifting on a triple chainring?
Jan
25
comment Ideal % jump between gears?
Ideally you would have a CVT type system like Nuvinci, but weight and complexity have resulted in such system being uncommon on bicycles. If you are working with derailleur gears using cogs, we've basically moved to the point where there is 1 tooth difference between adjacent cogs, with 2 teeth as the cogs get larger, and perhaps 3 teeth between the final 2 cogs. This is more a requirement to get the required range, and not because it is ideal in terms of efficiency. If they could get the same range with smaller steps, they would. Smaller gaps is always better in terms of efficiency.
Jan
25
comment Flywheel on a bike to smooth things out?
Also would affect braking if it was on the wheels. I didn't downvote, but I'm not even sure if these questions are really on topic. They are kind of "opinon" and aren't really answerable. They're more hypothetical, "what if" type questions that require long drawn out discussions as opposed to a concise answer with sources to back it up.
Jan
25
comment Flywheel on a bike to smooth things out?
I think that a flywheel on the chainrings would cause more problems than it is solve. Being able to stop pedalling quickly as you go into turns is a pretty important feature.
Jan
25
answered Worries about a gear ratio of 1:1?
Jan
22
comment Multi directional release pedals for road bicycling?
@Carel I tend to have strong disagreements with that rule. Road pedals (like SPD-SL or LOOK) are great for guys doing grand tours who will clip in at the beginning of the ride and then won't unclip for another 170 km. However, for cyclist who has to deal with traffic lights, cars, pedestrians, and might have to walk around in their shoes, something like SPD with a recessed cleat and the ability to clip in on both sides of the pedals makes things so much easier. In my opinion anyway.
Jan
21
comment Multi directional release pedals for road bicycling?
It's also worth mentioning that Shimano makes a multi-release cleat for their SPD system that will release both when pulling up as well as twisting. They also have the Click'r pedal system which is specifically designed to make it easier to clip in and clip out for recreational cyclists.
Jan
21
comment Left side isolated granny gear, right side all other gears? Possible and practical?
I think that this is a lot of complication for something that wouldn't be much benefit over a triple chainring. Using chainrings with 48-36-26 with a 12-30 cassette would give a plenty easy "granny gear" for the hills most people would willing to approach on a bike. Having a 20-50 super-granny gear as you propose would mean you were only going 4.5 km/h at 90 RPM, which is less than walking speed. At that pace, you might as well get off the bike and walk, as it will be more energy efficient.
Jan
21
comment Triple chainring + nonstandard sloped cogset. Can this work?
Apparently the Shimano XTR electronic shifter employs a similar method to the synchrobox and will shift both the front and back derrailleurs together to minimize cross chaining.
Jan
20
comment Can an aluminium frame rust from the inside if water has been in it for some time?
You do see stainless steel in bicycles. Just Google stainless steel manufacturers and you will see many manufacturers of SS bikes. But they tend to be pretty pricey. A well cared for chromoly steel bike will last decades, so there isn't really much demand for a bike with the added cost associated with purchasing a stainless steel bike. Plus, stainless can still rust if it isn't cared for correctly. If you want a true corrosion free bike, you should be looking at something like titanium.
Jan
20
comment At what temperature do you say its too cold to ride a bike?
-10f translates to -23c. If you travel at a slow speed of 15 km/h, that will yield a wind chill of -33c. At this temperature, you can get frostbite on exposed skin in 10 to 30 minutes.
Jan
16
awarded  Enlightened
Jan
16
awarded  Nice Answer
Jan
13
comment Gear shifts and drive speed on bikes
53/19 is an even smaller ratio at 2.79. Unless I really don't understand gear ratios.