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1

No If you need a lower gear ratio, swap out the cassette or chain rings on your existing bike. Always remember this quote by Greg Lemond: "It never gets easier, you just go faster."


5

Countering the excellent answer by @jc alan.... Carbon will not make you fitter or stronger. It will not make you ride smoother, choosing better lines though the corners and over the rock gardens. Carbon (any new bike) is an easy and expensive upgrade that gives a single step improvement and stops. It sounds like you are after more. What you need to ...


5

If you just need lower gears, you can switch to 24t inner ring. 24/42 is roughly the same as 30/51. I've played around a bit with really low gears and that's about the lowest gear that is rideable for me. Lower than than that and you have to spin like crazy just to keep the bike upright, walking tends to be faster at that point. Getting a really light ...


6

You can drop 2.2kg easily with upgrades to your current bike that would probably be less expensive than purchasing a new bike. Much of that weight could be dropped where it matters the most and where you will notice it first; the wheels and tires. Find a lighter weight wheelset with tubeless tires and sealant and I would almost guarantee you will drop over ...


2

what is the exact reason why belt drive systems are not available on carbon frames? In addition to the other answers that point out that there is no such reason, because the premise itself is false, I'll point out that while a split frame is a common way to accommodate a belt drive, it's by no means the only. The other main approach for accommodating belt ...


2

It is not the case that carbon frames are unavailable, but they are few and far between. There was the Trek District Carbon, but that was single speed. Apart from that the only Gates Belt compatible carbon frames I know of are made by http://olsenbicycles.com


4

By 'hop' I assume you mean radial run-out (as opposed to lateral run-out). A bent axle will have no effect on the rim running radially true or not, because the hub rotates around the static axle. A slightly bent quick release shaft will just conform to the bore through the axle and have no effect. A rim can be perfectly circular but still have radial run-...


4

It's very unlikely to be a crack because it is the same width throughout (cracks tend to be wider in the centre, or at least irregular width) and because it is straight, not jagged. The shallow depth is also a clue that it is a scratch. You can shine a focussed flashlight into it and see if it reflects from the bottom. If it does, then a scratch is the ...


0

Its a scratch you shouldn't be worried about it


7

If you saw my Stevens Team Carbon cyclocross frame you'd feel much better.


13

That's just a light scratch. No issues. if you are worried that the carbon-fiber composite has been damaged by an impact or scratch, the abrasion is far too shallow for that. It has not even penetrated through the paint. It's not a crack because cracks do no start in the middle of frame tubes, they propagate from edges or holes.


1

This is an interesting question to explore in concept. Or at least, I find this concept somewhat interesting to explore. In general, where would one get data on the failure rates of mechanical or electronic equipment? Frequently, there is no government-mandated reporting for failures of, for example, hard drives. In public health, my main field, we would be ...


3

I've read a lot of carbon fiber vs aluminum debates. Does anyone know where I can find actual failure stats for mountain bike frames? How many warranty repairs per year for each type vs sales volume, for example? I'm reading this as a strength of materials focused question - carbon vs aluminum. Summary: For a properly designed, well made frame on a ...


3

It might be hard to tell by closely inspecting the repair how well the work was done, or for that matter how badly the frame was damaged. I would ask to see pics of how the damage looked prior to repair. I would inquire about his experience repairing carbon frames, see if he has any testimonies from other customers. I assume he buys cracked frames and ...


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