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Sep
11
comment How much maximum force can be applied by fingers on the brake lever?
I guess it depends on how strong your grip is. A strong man would have much more grip strength compared to a small woman, on average. Hand brakes on bikes for small children (5 and under) are next to useless because they lack the hand strength to operate the brake effectively.
Sep
10
comment Shimano Claris vs 105?
@MMG A lot of people might not have retained the receipt from a bike they purchased. Some people may have bought the bike second hand and never got a receipt. I don't think there's any way I could prove that I actually own my bike. Perhaps meet the buyer at the local bike store where I bought it. I'm known by a few of the staff and I'm sure they would vouch for me. I'm not so sure a receipt would matter much anyway, as somebody skilled on a computer could print up a receipt that looked reasonably legitimate anyway.
Sep
10
comment What is the spacing for trek 1.1?
You're right, I should have typed 4mm rather than 5mm. Looking at the standard spacings it seems that all the spacings used are 4 or 5 mm apart at minimum. Still, a ruler should suffice for any measurements of the hub.
Sep
10
comment What is the spacing for trek 1.1?
In any case, it's probably a good idea to just measure. The valid options are in 5 mm increments, so even a basic measuring tape or ruler will suffice. It's not like it's a seatpost where you need a micrometer to figure out what width they ended up using.
Sep
9
comment Shimano Claris vs 105?
@Batman It seems to me that a compact has pretty much become the standard in road bikes unless you're looking at stuff in the very high end, as most casual riders don't have the power to get up all the hills with a 52-39 crankset. If you live in a place without a lot of hills, you might be ok with a compact 50-34 and an 12-23 cassette, but most people will probable appreciate a triple with something like 50-39-30 or 52-42-30.
Sep
6
comment I cannot go 30 miles without a flat. I can't figure out what the problem is
Those tubes seem to have some questionable reviews. perhaps try a different brand of tube. Also, after installing, and before inflating, go around the rim pushing the bead away from the rim to check that there is no tube between the tire and the rim. after you've gone all the way around on both sides, you can be reasonably sure that it's not pinched between the rim and the tire.
Sep
3
comment Stuck Bottom Bracket
I had one that was really stuck. Wasn't even rusted in, just really tight. A 6 foot pipe on the end of the bottom bracket wrench did the trick.
Aug
27
comment What is meant by “inches of travel”?
@GrimmTheOpiner What's that about more gears?
Aug
25
comment How do I calculate calories burnt using my bicycle's weight?
Also, it sometimes seems to take a little while to change the calorie count, even if you did refresh it. When switching my ride back to the original bike, the first refresh did not show the calorie count changed back to the original value. I had to refresh a second time. Also, depending on the weight difference of the two bikes, it may or may not end up calculating a different number of calories. My second bike was a full 48 kg more than the original bike.
Aug
25
comment How do I calculate calories burnt using my bicycle's weight?
Actually it does affect the calorie count. I just tried it on my own account. I had a ride that was 1 hour 50 minutes, and covered 50 km. I did the ride on my touring bike which I have entered as 12 kg. Strava says I burned 965 Calories. When I switched it to the Tag Along Bike, which is just the same bike with the tag along mount for my kid mounted, which I have entered at 60 kg, it changes the calorie count to 1201 calories. You have to make sure you refresh the screen after changing the ride, but it's definitely taking the bike into account.
Aug
25
comment How do I calculate calories burnt using my bicycle's weight?
Perhaps you could add a new bike to Strava, and then assign that bike to the ride. I'm pretty sure assigning a different bike to the ride will cause it to recalculate the calories burned.
Aug
21
comment Can I secure a 12v battery to my bicycle to charge it? And then attach a 12v horn to it?
Sounds like a lot of effort just to get a horn. Most 10 Volt batteries are going to weigh around 10 pounds, possibly more. There's lots of options for loud bicycle horns that don't require carrying around such a large battery.
Aug
21
comment Minimum tire pressure for 20 mph (32 kph) turn
Yeah, too many variables to really say one way or the other for tire pressure. I would think that less tire pressure would be better as there would be a larger contact patch. Other things you would have to take into account are the camber of the riding surface. If you're on a velodrome track, then going around the corner is almost the same friction as going in a straight line. Compare that to some city streets with negative camber to help water drain, and you have 2 entirely different situations. The most important part is what path you take around the turn.
Aug
21
comment Why Do the same size tires say they can hold different amounts of air (psi), and does that matter?
I believe you about the rim. But how come we never see (or I have never seen) maximum tire pressures printed on the rim? If you took high quality road tires and inflated them to 160 PSI on a cheap Walmart road bike, what would happen? Would there be a reasonable probability that the rim would explode?
Aug
14
comment Is Sram PG850 cassette a substitute for Shimano TZ31 freewheel?
You can use the same freewheel, or get one with slightly different gearing. If you don't use the 34 tooth cog at all, then you can get a freewheel that has something smaller in it's place. Most people won't need a cog like that unless they are not in good shape or carrying a heavy load or trailer. Might also be useful if you have some really steep hills in your area. But with a 28 on the front chainrings, a 34 tooth cog probably isn't use a lot.
Aug
10
comment How to estimate price of an old CrMo frame?
I would say this is a good starting point. Possibly the price of an entire bike. The price to purchase a frame by itself and get all the parts of the damaged bike working on a new frame would likely cost more in labor than just buying a complete new bike. That's assuming the parts are even compatible and that you can just move all the old parts to the new frame. Likely there will be one or more parts that aren't compatible. Possibly missing mounting points for the old downtube shifters or the old bike will use 27 inch as opposed to 700 wheels.
Aug
8
comment Dealing with homicidal drivers
I think Hanlon's razor applies in this case. "Never attribute to malice that which is adequately explained by stupidity".
Aug
7
comment Larger sproket on a single speed crankset?
You'll want to make sure there's enough clearance between the new chainring and the chain stay. You should be able to increase your chainring size, but I wouldn't be surprised if a 50+ tooth chainring ended up interfering with the chain stay. Also, you mention you have $500 to upgrade, you might have been better off just putting a couple hundred extra into the initial bike, as you usually get a much better deal on parts when they come already on the bike.
Aug
6
comment choosing a dahon bike
They have a wide range of bikes, with a variety of different gearing options. It would be very time consuming to write all that information here, and it would become outdated quickly. Go on over to their site if you want to find out more about their bikes. If you are referring to their folding bikes with 16-20 inch wheels, you probably won't be able to go that fast because of the small wheel size. At least not as fast as you could go on a traditional bike.
Aug
1
comment How much speed can I buy
+1 for mechanical doping. Seriously, if money is no obect and all you care about is going fast, then a motor is probably a good solution. You could probably get a Trek Emonda SLR 10 which weighs in at 10.25 lbs, and not even get close to the gains that a motor would give you. The real answer to go faster is to have a decent bike and increase your fitness through training. But if you want to throw money at the problem, then a motor cannot be beat.