(randombikeparts.com) crankset designed with fake hex bolts to hide the fact that it's riveted

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noviceBuilder   1 mW

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(randombikeparts.com) crankset designed with fake hex bolts to hide the fact that it's riveted

Post by noviceBuilder » Apr 29 2020 1:57pm

When you look at this crankset, it looks as if there is a hex or torx bolt attaching the crank arm to the sprocket, as if to suggest that it's not riveted so you can replace the sprockets individually as they wear out:
Image
but that's not the case. If you have a meticulous eye, you can see that the hex bolts are too shallow to fit a tool and on the bottomside the rivets have no slot for a chainring tool.

I was fooled. I asked Random Bike Parts what the BCD was before ordering. They ignored the question. So I figured: whatever the BCD is, I'll deal with it when it's time to replace the cogs. But when the thing arrived, it was quite clear that the sprockets are riveted together so when one of them wears out, the whole crankset must be scrapped together. I'm annoyed by the wastefulness of it. I suppose I could grind the rivets off with an angle grinder, but it seems as if the BCD is quite rare anyway (102mm by my measurements on the crankset I ordered, which differs from the pictured one).

I can't really beat the merchant up too much.. their only offense was non-disclosure of the rivets in the ad, and then not answering my question. But I must say it's quite sneaky of the manufacturer to use rivets that fake the appearance of bolts to deceive buyers. If I were on Reddit, I'd file this under r/assholedesign.

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amberwolf   100 GW

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Re: (randombikeparts.com) crankset designed with fake hex bolts to hide the fact that it's riveted

Post by amberwolf » Apr 29 2020 4:20pm

That's quite common; I've seen this on cheap bikes for at least a couple decades.

larsb   10 MW

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Re: (randombikeparts.com) crankset designed with fake hex bolts to hide the fact that it's riveted

Post by larsb » Apr 30 2020 5:03am

couldn't you drill them out? could be a possibility if the BCD is std on the rivets

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amberwolf   100 GW

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Re: (randombikeparts.com) crankset designed with fake hex bolts to hide the fact that it's riveted

Post by amberwolf » May 01 2020 12:03am

larsb wrote:
Apr 30 2020 5:03am
couldn't you drill them out? could be a possibility if the BCD is std on the rivets
noviceBuilder wrote:
Apr 29 2020 1:57pm
I suppose I could grind the rivets off with an angle grinder, but it seems as if the BCD is quite rare anyway (102mm by my measurements on the crankset I ordered, which differs from the pictured one).

larsb   10 MW

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Re: (randombikeparts.com) crankset designed with fake hex bolts to hide the fact that it's riveted

Post by larsb » May 01 2020 12:42am

Ahem, sorry :wink:
Apparently didn’t read well enough. I guess i would never made the original post myself if it was only to drill out and replace.

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