Are These Counterfeit Shimano Rim Brakes?
04-02-22, 12:20 PM
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Are These Counterfeit Shimano Rim Brakes?
Bought these used off online swap meet. I have the same brakes on another bike, so I'm pretty familiar with them. Right away, in my hands something seemed off about the gap between the two halves of the assembly. Once I got them on the bike it became more strange. Without a cable installed, there is no gap between the calipers to get the wheel on...I had to force the wheel on.
It's not easy to tell by the photos how close they are, but on one side the pad is effectively touching the wheel, and on the other side, it's closer to touching than a person would typically ride...certainly far closer than it should be without a cable installed. Making matters worse, the pad carrier on the nearest side is resting against the paint on the fork, which direct mount brakes should never do, not even when opened. So even if you could adjust it away from the wheel, it would just be driving harder into the fork.
The brakes look very genuine, and I've compared them closely to my fully genuine set, so I'm wondering if they aren't a lemon. I just see no way to adjust the multi-faceted issues out of this caliper.
**Note: the last photo is the genuine set on my other bike. Note the gap between the two halves of the calipers, properly adjusted and still not touching the wheel, while the in-question set is right up against the wheel and has no gap.
It's not easy to tell by the photos how close they are, but on one side the pad is effectively touching the wheel, and on the other side, it's closer to touching than a person would typically ride...certainly far closer than it should be without a cable installed. Making matters worse, the pad carrier on the nearest side is resting against the paint on the fork, which direct mount brakes should never do, not even when opened. So even if you could adjust it away from the wheel, it would just be driving harder into the fork.
The brakes look very genuine, and I've compared them closely to my fully genuine set, so I'm wondering if they aren't a lemon. I just see no way to adjust the multi-faceted issues out of this caliper.
**Note: the last photo is the genuine set on my other bike. Note the gap between the two halves of the calipers, properly adjusted and still not touching the wheel, while the in-question set is right up against the wheel and has no gap.
04-02-22, 12:42 PM
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Hard to tell from photos, but the new pads look beefier than the one in the last pic.
04-02-22, 01:00 PM
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They are, but by a couple millimeters. These brakes should (and genuine ones do) open up enough that even with brand new pads, the wheel will easily slide in with lots of room to adjust inward. These brakes in question sit on or right up against the wheel without ANY cable tension or even a cable installed.
04-02-22, 01:12 PM
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You might have the adjustment screwed most of the way in. Usually dual pivot brakes have an adjustment to help with centering them. Little tiny screw on one caliper near the pivot.
No, I'm not talking about the barrel adjuster.
Shimano is the only entity you should trust to determine if they are counterfeit.
No, I'm not talking about the barrel adjuster.
Shimano is the only entity you should trust to determine if they are counterfeit.
Last edited by Iride01; 04-02-22 at 01:15 PM.
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04-02-22, 03:15 PM
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Are the washers between the brake arm and pad the same thickness? On the forks, are the mounting holes the same distance apart?
Edit: The above is what popped into my head just from a general mechanical standpoint. But I researched and it appears some models are made for wider tires and some have the arms spaced further apart. Could possibly explain it. Maybe they aren't the identical same model number.
Edit: The above is what popped into my head just from a general mechanical standpoint. But I researched and it appears some models are made for wider tires and some have the arms spaced further apart. Could possibly explain it. Maybe they aren't the identical same model number.
Last edited by freeranger; 04-02-22 at 05:10 PM.
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04-03-22, 06:04 PM
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What's your rim width?
https://bike.shimano.com/en-EU/produ...R-R8010-F.html
https://bike.shimano.com/en-EU/produ...R-R8010-F.html
