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Jul
13
comment Upgrading wheels on a vintage Peugeot Frame
You need to accurately measure the bead seat diameter of your existing rims. This will involve taking the tire off, measuring the outer diameter of the rim, then subtracting off the depth from rim outer edge to the inner edge as seen in the diagram. Be sure to subtract this depth off TWICE since it's on both sides of the wheel diameter.
Jul
13
comment Attach bottle cage to frame w/o mount screws
@JohnP - I can assure you that quite commonly the frame tubes are open to the bottom bracket. This is desirable to allow any accumulated moisture to escape.
Jul
13
comment Attach bottle cage to frame w/o mount screws
I'd still trust spiral hose clamps a lot more.
Jul
13
comment How to achieve a tighter turning radius?
The geometry of the bike has a lot to do with it. A road bike inherently will have a larger turning radius than a mountain bike or short track bike. You can improve the radius somewhat by leaning your body in while keeping the bike more upright,
Jul
12
comment Attach bottle cage to frame w/o mount screws
I wouldn't expect that zip ties would hold a bottle cage securely, unless there was at least a rubber strip between cage and tube.
Jul
12
comment When do my brake pads need replacement?
Well, you replace them when they're worn out. The important thing is to do more than glance at them. Typically the pads will wear faster on the rearward end than on the front end, so you need to observe both ends. You want to replace them before they're in any danger of having the metal holder contact the rim. And, of course, replace them if they seem to be disintegrating. But a set could easily last 2 years -- my last set lasted over 15 years and 20K miles. It depends on how much you use the brakes.
Jul
12
comment What are some red flags to look for when buying a used road bike?
Don't buy a bike that's clearly been left outside most of the time (lots of corrosion, rust on the chain, etc). Don't buy a bike that has any appearance of major abuse, or with alterations (cutting/drilling) to the frame or fork. Don't buy a bike that's stolen.
Jul
12
comment How wide of tires can I run on a Victory Vision road bicycle?
A standard inflated tire (ignoring any heavy lugs on the tread) will adopt a roughly circular cross-section when inflated. So if you're thinking of installing a 35mm tire, the tire would extend a bit less than 35mm up from the outer rim edge, and the widest spot would be about half that distance up. But of course no tire size is exact, and the actual width will also vary depending on the size or the rim used, so you need to allow a bit of extra clearance. (A bike shop might do you the favor of fitting various wheels/tires into the frame to see what "reality" looks like, if you ask nice.)
Jul
12
comment Attach bottle cage to frame w/o mount screws
@WTHarper - There's nothing "cheap" about braze-ons. Brazing is used on good quality steel tubing to prevent destroying the temper.
Jul
12
comment Attach bottle cage to frame w/o mount screws
I would advise a clamp-on unit. You can buy separate clamp assemblies for bolt-on cages if you want to use a specific cage, or you can improvise with hose clamps and a strip of sheet metal. I'd be a little leery drilling holes.
Jul
11
comment Does an SPD-SL AND SPD compatible pedal/shoe exist?
I vaguely recall that at one time, 15-20 years ago, there were a few double-sided pedals that had SPD on one side and SL on the other. I doubt that they sold very well, though.
Jul
11
comment Replacing 42/52 crankset to 39/52 - will it make a difference?
It'll make some difference. Your current freewheel/ring combo produce a 1.5 ratio on the 28t cog and a 1.75 ratio on the 24t cog. The 39t ring would produce a 1.39 ratio at 28t and 1.625 ratio at 24t. So that works out to about half a rear cog jump.
Jul
11
comment How wide of tires can I run on a Victory Vision road bicycle?
@Ehryk - Rim width is measured on the inside.
Jul
11
comment How wide of tires can I run on a Victory Vision road bicycle?
There are three things that limit the size of the tire: The rim width, the clearance between tire and frame/fork, and brake clearance. Generally you can go about 50% wider than the rim, but it's going to vary a bit with tire and rim. Sheldon may have some details. Frame and brake clearance you have to assess yourself.
Jul
11
comment Why do some road bikes cost more than motorbikes? Are they grossly overpriced?
@StephenTouset - Yeah, SRAM and Bontrager/Trek are nibbling at the heels of Shimano, but they're no real threat unless Shimano really blows it, PR-wise. People tend to view SRAM and Bontrager as "second rate" compared to Shimano. (And Shimano has had a lot of practice driving other suppliers out of business.)
Jul
11
comment Why do some road bikes cost more than motorbikes? Are they grossly overpriced?
(And, of course, Shimano is the Microsoft of bicycles -- it gets a substantial chunk of the price of a bike because it has so little competition and can charge whatever it wants.)
Jul
11
comment Why do some road bikes cost more than motorbikes? Are they grossly overpriced?
Keep in mind that for any product to be profitable it must "recover", on each sale, development costs divided by total units sold, plus manufacturing, cost of sales, and a suitable profit. Expensive bikes sell very few units. (And, of course, beyond that every manufacturer will naturally charge "what the market will bear".) In any event, no one who is not either a pro or an avid amateur needs a $4000 bike -- a bike in the $1000-2000 range will be just as serviceable, and even a $500 bike will suit most people just fine.
Jul
11
comment How can I prevent “chain suck”?
I generally say that a rear cassette is good for about 5000 miles. If you've had the bike for 5 years you could easily be beyond that. Also, I forgot to mention that chain wear can be a factor -- a chain is good for about 2000 miles. Replace both, and have a bike shop check the wear on the front sprockets as well (they should have a special gauge).
Jul
11
comment Which tires should I buy for an old road bike?
For a standard road bike you don't need a lot of tread on the tires -- tires that are "slick" down the middle will roll a hair easier. Depending on road conditions you may wish to consider "Kevlar belted" tires or some other puncture resistant technology -- these can reduce the frequency of puncture 10x. (But avoid "Kevlar bead" tires.) Otherwise there's not much to differentiate between, other than some difference in quality between manufacturers. (But also avoid tires with tan/white "gumwalls", if they still make those -- get tires that are black all around.)
Jul
11
comment Why do some road bikes cost more than motorbikes? Are they grossly overpriced?
The price (and much more) is justified if you're a professional rider, or an amateur who wishes to be ultra-competitive. Otherwise it's the same as someone who buys a tricked-out pickup truck that he's afraid to get muddy. A good "regular" bike, though, can cost upwards of $2000, depending on style.