How long should a bike frame last

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SkipdiverJohn

Deplorable Brexiteer
Location
London
My Van Nicholas has a lifetime warranty

I should hope they do given the price of them! Particularly as Titanium frames suffer a disproportionately high weld failure rate considering they are only a tiny niche portion of the market. Back in the day when Raleighs were Raleighs they offered a 15 year frame warranty, even on low-end gas pipe models. As a youngster I never saw one fail apart from crash damage which was down to the rider being an idiot, not Raleigh's build quality.
 
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johnnyb47

johnnyb47

Guru
Location
Wales
Unfortunately even though my Specialized frame has a life time frame guarantee, it was a second hand bike for me, so I don't think it would apply
 

si_c

Guru
Location
Wirral
Not to mention far too much exposed sestpost. The upbulb if the failures ive seen over the years are just forawrd of the top tube/seat tube junction, and all had a huge length of seatpost acting as a lever. The modern trend for more comoact frame sizes doesn't seem to have helped.

That's where my Felt failed, the weld at the seat tube/top tube cracked. I end of lifed the frame right there and as the frame was 2 months over 2 years old Felt advised that it wouldn't be covered under warranty. I could have had it repaired but finding someone to do the work and then get the bike repainted wasn't economical.

I think it likely that because I had nearly 400mm of exposed seatpost the leverage that gave my not inconsiderable bulk over ~20k miles of rough roads meant the frame failed early. A design failure IMO. Nevertheless I've not got a Kinesis Racelight 4s which has a more traditional frame geometry and as a result looks better, and is less likely to have issues.
 

si_c

Guru
Location
Wirral
Unfortunately even though my Specialized frame has a life time frame guarantee, it was a second hand bike for me, so I don't think it would apply

That's likely to be the case unfortunately. I wouldn't worry about it though, keep the bike in good condition and inspect it regularly when you clean it and you shouldn't have any issues.
 

classic33

Leg End Member
Exactly, how long is a piece of string. I suppose you've got to factor in the general road conditions, riders weight and how aggressive that person is in there cycling style, but there's got to be some sort of general window as to when a frame would eventually fail mileage wise🤔 I'm kind of roughly hedging my bets it would be anything from around 50k to 70k on an alloy bike like mine..(I'll let you know in 100 years time 🤣🤣)
25% of it's original length.
 

Smokin Joe

Legendary Member
I don't mind a slightly sloping frame, but the top tube angle on some is absolutely ridiculous. Even a basic understanding of engineering will tell you that having a large amount of seatpost sticking up is putting a major strain on the frame.

Another thing I am wary of are "Fastback" seat stays. The design just does not look as structurally sound as the traditional method of taking the stays to the top of the tube and giving the frame extra rigidity at the point it is under most stress from the rider.
 

Johnno260

Veteran
Location
East Sussex
Read the small print on the lifetime warranty, most will invalidate the warranty if a mechanic who isn’t a brand specialist or brand trained touch the bike.

My Merida warranty is invalid as the guy who sold me the bike and was a Merida stockist serviced the bike and upgraded the group set, after he closed the shop and became a mobile bike mechanic.
 

Saluki

World class procrastinator
585813


1982 DB (Dronfield). Had new wheels, saddle etc over its life but still going strong. I love this bike. There are folks with Way older frames, but this is my oldest.
 
My Dahon came with 5 year warranty. After 13 years of daily use I must have racked up 40-50,000 miles. There are 2 breaks in the frame but it came that way ( folding hinges).
 

ColinJ

Puzzle game procrastinator!
I've been riding my Al Cannondale CAAD 5 (<--- see avatar) off and on for about 18 years, during which time it must have done many tens of thousands of kms (not quite so many tens of thousands of miles :laugh:). I have weighed up to 115 kg (18+ stone) in those years. I have ridden rough roads and even a few bridleways on it. I have descended hills at 90 kph (55+ mph). No problems with it so far! :okay: ***





*** Obviously, the frame will go and snap in the next few weeks now... :whistle:
 
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