AlanW
Guru
- Location
- Not to sure?
Regarding the recent Shimano recall on Ultegra and Dura Ace chainsets.
Unfortunately l have four chainsets that are potentially affected by the recall, but yesterday that figure was reduced to three.
But not due to the recall, just good old wear and tear.
The chainset in question was fitted in 2012 to a Ridley Triton, that bike covered circa 90k miles before the frame snapped on the drive side rear dropout. The same chainset was then fitted to my current Kinesis T3 frame, this has now covered 33k miles, and touch wood is still going strong.
But the bike in question started creaking yesterday when applying effort out of the saddle. Thinking that it may be recall related, when l got home the immediate plan was to strip out the chainset to conduct a closer examination.
Prior to its removal l noticed that there was slightly more "play" between the chainset shaft and the bottom bracket bearings. My intial thought was maybe one of the bottom bracket bearing had disintegrated, which wouldn't be the first time.
However, on removal both bearing were perfectly okay, it was the groove worn the chainstay main shaft that was the issue. It's hard to tell from the photo but the wear on the shaft is really quite bad, but only on 75% of the circumference, the other 25% of the shaft has zero wear. Which maybe suggests that it's worn due to the load being applied unequally on the pedals?
Which l guess after covering around 130k miles l've certainly had my monies worth.
Plus, l also don't recall ever replacing either of the chain rings during that time? 🤔
Unfortunately l have four chainsets that are potentially affected by the recall, but yesterday that figure was reduced to three.
But not due to the recall, just good old wear and tear.
The chainset in question was fitted in 2012 to a Ridley Triton, that bike covered circa 90k miles before the frame snapped on the drive side rear dropout. The same chainset was then fitted to my current Kinesis T3 frame, this has now covered 33k miles, and touch wood is still going strong.
But the bike in question started creaking yesterday when applying effort out of the saddle. Thinking that it may be recall related, when l got home the immediate plan was to strip out the chainset to conduct a closer examination.
Prior to its removal l noticed that there was slightly more "play" between the chainset shaft and the bottom bracket bearings. My intial thought was maybe one of the bottom bracket bearing had disintegrated, which wouldn't be the first time.
However, on removal both bearing were perfectly okay, it was the groove worn the chainstay main shaft that was the issue. It's hard to tell from the photo but the wear on the shaft is really quite bad, but only on 75% of the circumference, the other 25% of the shaft has zero wear. Which maybe suggests that it's worn due to the load being applied unequally on the pedals?
Which l guess after covering around 130k miles l've certainly had my monies worth.
Plus, l also don't recall ever replacing either of the chain rings during that time? 🤔
