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tubo orizzontale

Aluminum or carbon?

I would like to get a front fork for marathon or amateur XC riding. I am just starting out with MTB, and given that there is little difference in price between aluminum (€1,300) and carbon (€1,500), I would like to take a chance.

For me, carbon is obviously a wonderful material. You can shape it however you want; the only limit is your imagination. In fact, all my bikes are made of carbon, but I understand that people may have doubts.

Carbon is more fragile in the event of an impact, as many already know, but, given that everything depends on the engine (the cyclist themselves), a carbon frame generally performs better than an aluminum one because it has characteristics of flexibility and rigidity that aluminum can never match for the same weight.

For a beginner, it is not so important to choose carbon or aluminum, but rather, if possible, to try out the bikes you are interested in, listen to the sensations they give you, and, of course, choose the one that gives you the best sensations.

I have a carbon fiber Sarto frame with a crack on the left chainstay. This crack is detached. I would like to know if it is possible to repair it.

Repair is possible, but it is difficult to provide an estimate without photos. Therefore, we advise the owner of this bike and any other users of the site not to use the FAQ form for such specific questions. To receive targeted and personalized answers, it is better to use the two appropriate forms, “request a free estimate” or “info,” where you can attach photos!

Where can I purchase cable guides and tension adjusters for the rear derailleur and front derailleur to fit on a carbon frame?

Where can I buy cable guides and tension adjusters for the rear derailleur and front derailleur to fit on a carbon frame? Who manufactures or sells them?

I usually build them myself for my bikes, but normally these accessories are sold by suppliers of tube kits for frame builders, such as DEDACCIAI, COLUMBUS, and AMADEUS.

Repairing an FSA K-Wing curve

Can an FSA K-Wing bend damaged by tightening the attachment be repaired? I'm not sure if it's broken... I tried scraping the paint off, but it's hard to tell if it's really broken. How much would the repair cost? Of course, I also have to factor in shipping costs.

I don't think repairing the bend is a good idea, for two reasons:

  1. at that point, where the handlebar clamp is tightened, it is not possible to add additional layers of carbon to strengthen the part, due to the required diameter.
  2. the total cost of the repair, added to the shipping costs, would certainly be too high compared to the value of the component.

That said, I must also say, in all honesty, that I have carried out several repairs of this kind for people in my area, but in their case the damage was always fairly minor and, as they did not have to pay shipping costs, the cost of the repair was cheaper for them than buying a new part.

STUMPJAMPER front 26er conversion

I have a 2007 STUMPJAMPER front 26er with a 100mm RS fork. Can I use 27.5 wheels without modifying the frame or fork?

None of the frames I have modified so far were like this one, so I can't give you a definite answer, but I don't think the fork will work. The best thing would be to try it with a 27.5 wheel to see how much space there is between the tire and the fork crown. I would recommend doing the same for the rear wheel.

If you don't have a 27.5 wheel available to do these tests, there is a very empirical method you can use: measure the space between the dropouts and the 26 tire, both front and rear. If the space is greater than 2 cm, it is likely that 27.5 wheels can be fitted without any problems; if not, then obviously not.

However, this method is not 100% reliable, as it is important to remember that a lot also depends on the type of tire you choose to fit.