Broken Bike Bits
See also also bike pic
for other bike-related technical discussions and more failed parts.
Axles
- First page -- Aluminum axle fails at bearing shoulder.
Bottom Brackets
- First page -- Isis failure, nearly-new, touring cyclist.
- Second page -- Viscount notched spindle failure.
- Third page -- Campagnolo Ultra-Torque bearing failure.
- Fourth page —
steel BMX crank spindle failure at arm
Brake
Cable, Housing, and Stops
Chainrings
Cranks
- First page -- from the collection of Ric Hjertberg.
- Second page -- welded tubular steel failure, Bullseye
- Third page -- welded steel failure, Tioga Revolver
- Fourth page -- split along square taper, Campagnolo
- Fifth page -- non-failed Sweet Wings crank
- Sixth page -- carbon crank fails parallel to chain line, Colnago
- Seventh page -- vintage crank failure
- Eighth page -- failure away from features, Dura-Ace
- Ninth page -- Race Face arm failure away from features
- Tenth page -- arm failure at pedal eye, newer Campagnolo Super Record
- Eleventh page -- crack at spider/arm transition, Cannondale Coda ``Magic''
- Twelfth page -- arm failure at pedal eye, older Campagnolo
- Thirteenth page -- arm failure at pedal eye,
older Shimano Dura-Ace, replacement with Jobst Brandt collet.
- Fourteenth page -- arm failure at square
taper, late 1990's Topline.
- Fifteenth page -- square taper failure,
Grafton Joystix
- Sixteenth page -- CODA Magic hollow crank separation at glue line
- Seventeenth page -- middle of arm, Campagnolo c. 2002
- Eighteenth page -- hollow crank failure
at end of hollow section.
- Nineteenth page -- pedal eye failure despite
use of pedal washer
- Twentieth page -- Arm failure at square taper, Topline
- Twentyfirst page -- Arm failure at end of
groove, partial failure both arm/spider transitions; 1970's
Campagnolo
- Twenty-second page -- 1970's crank failures:
T.A., Stronglight, 2x Campagnolo.
- Twenty-third page -- CODA Magic hollow crank separation at glue line
- Twenty-fourth page -- tubular steel crank failure at pedal eye, Bullseye
- Twenty-fifth page -- two crank failures,
one rider: Race Face Isis Turbine LP,
Race Face Next LP
- Twenty-sixth page -- crank failure,
C-section arm
- Twenty-seventh page -- crank failure,
hollow arm
- Twenty-eighth page -- crank failure,
left-side square taper, away from crank
- Twenty-ninth page -- crank failure,
at pedal eye
- Thirtieth page -- Truvative Styleo Team,
near spider
- Thirty-first page —
failure at spider/crank transition
- Thirty-second page —
presumed failure at spider/crank transition
- Thirty-third page —
Bontrager aluminum crank failure in rounded section
- Thirty-fourth page —
failures of three "vintage" cranks of unknown history
- Thirty-fifth page —
Campagnolo "Grand Sport" failed near pedal eye
Crank Spider
Forks
Frames
- First page -- down tube buckles at center while braking
- Second page -- failure at weld
- Third page -- failure in a crash
- Fourth page -- failure long
seatpost/short insertion
- Fifth page -- seat stay failure, steel frame
- Sixth page -- dropout/stay failure, steel frame
- Seventh page -- dropout/stay failure, aluminum frame
- Eighth page -- four dropout/stay failures,
one rider, steel frames
- Ninth page -- dropout failure, aluminum frame
- Tenth page -- seat tube/bottom bracket
failure, steel frame.
- Eleventh page -- dropout failure, steel frame;
seat tube/bottom bracket failure, aluminum frame.
- Twelfth page -- bottom bracket seat/down
tube failure, titainum frame.
- Thirteenth page -- down tube failure near
head tube, steel frame.
- Fourteenth page -- removable derailleur hangar
failure.
- Fifteenth page -- head tube separation
after a crash.
- Sixteenth page -- swingarm separation at weld.
Handlebars
Headsets
Hubs
Nipples
Pedals
Rims
- First page -- Spinergy aluminum rim failure
- Second page -- Mavic 517 spoke bed
failure, tube bed failure
- Third page -- Sun "zero degree" rim
failure at spoke bed; may have been overtensioned
- Fourth page -- H Plus Son "Formation Face"
tube bed failure
Seat
Seatpost
Spokes
- First page -- first-generation R-Sys failures after accidents; notable for the severity of the failures
- Second page -- second-generation R-Sys failure
Sprockets
Stem