Bike Forums - Evolution of the rear dropout

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- - Evolution of the rear dropout (https://www.bikeforums.net/bicycle-mechanics/227087-evolution-rear-dropout.html)

ridelugs

09-15-06 11:06 AM

Quote:

Originally Posted by lyledriver

Ridelugs,
I'll take a stab at answering your question (even though you didn't ask nicely)..

Axles break more often on older freewheel hubs, where the drive side bearings are further from the dropout than the non drive side. It just so happens that these hubs are usually in horizontal dropout frames.

blah blah that if those same axles were placed in a vertical drop out, thier failure rate would drop exponentially.

simplify

09-15-06 01:01 PM

:rolleyes: :rolleyes: :rolleyes:

LWaB	09-15-06 02:59 PM

Quote:

Originally Posted by ridelugs

blah blah that if those same axles were placed in a vertical drop out, thier failure rate would drop exponentially.

I break about one Campag 7sp freewheel axle a year, whether riding a bike with vertical dropouts or one with horizontal. Even though it is a sample of one (and therefore statistically meaningless), wouldn't you expect to see a difference using that logic? :rolleyes:

John E

09-15-06 03:11 PM

I have vertical dropouts on the 1988 Schwinn mountain bike, horizontal on my road bikes (1959 to 1981). When pushing a rear derailleur to its cog size and chain wrap accommodation limits, horizontal adjustability can be VERY handy.

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