RoadBikeReview.com's Forum Archives - General


Archive Home >> General(1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 )


fatigue life. Truthful answers only. No bike shop rumors(3 posts)

fatigue life. Truthful answers only. No bike shop rumorsboxer
Jul 8, 2001 12:36 AM
please.

Heres the question:

Realistically, how long, considering it was built to the tubing manufacturer's specs, can an average Dedacciai-tubed, sub-2.2lb road frame last?

Does anyone have some good data oe experience on this? THanks for your help.

Mikey
...About a million pedal strokes.PsyDoc
Jul 8, 2001 8:53 AM
Actually, I do not know for sure as it would depend on many factors, including rider weight, frame design, type of riding, terrain, etc. There is some information provided by Damon Rinard, but keep in mind that these tests were done in 1997 and manufactures have implemented changes since that time: http://www.damonrinard.com/EFBe/frame_fatigue_test.htm. Anyway, a similar topice was discussed at length about 3 months ago. Use the search option and type in "Fatigue Life of Aluminum" and you will find a good number of discussions.
So many factors to consider.Largo
Jul 8, 2001 3:13 PM
A bike that doesn't get ridden will last forever, of course.
The pros' race a frame for a season (sometimes less) and then get a new one the following season, and usually train on something else.
Since most riders, except for the most active cat1/2 riders, won't put those kind of miles and abuse on a racing frame, the "average" rider could expect to get a lot of use out of a light frame.
How many miles do you put on it in a year? Road quality? Lots of hard sprinting?
Always inspect the critical areas (like the head tube/top tube/down tube welds) for paint cracks, which can indicate cracks or fatigue.
A good friend rides a Rocky Mountain scandium tubed Turbo, and has used/abused it for 3 years now, and no problems.
Bottom line, there is no hard and fast rule for life expectancy of a frame.
For more info than you could ever want regarding non ferrous alloy fatigue strength etc... go to www.efunda.com