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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 11-26-11, 07:25 PM   #1
hadeone
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Difference between Tektro R350 and 510A brake calipers?

Both the R350 and 510A calipers come stock on most entry level bikes.

Does anyone know the differences between these two calipers, if any?

Thanks.
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Old 11-26-11, 07:38 PM   #2
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I'm fairly certain the 510A is just the OEM version of the R350. Not sure why they'd bother with two different model numbers.
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Old 11-26-11, 07:42 PM   #3
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R350 are short reach with recessed nut and 510A are long reach with external nut.
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Old 11-26-11, 07:46 PM   #4
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Not according to this and various other sources. I have one of each in my parts bin and they're the same.
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Old 11-26-11, 07:54 PM   #5
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Not according to this and various other sources. I have one of each in my parts bin and they're the same.
Strange, because the 300 series is short reach and the 500 series is medium to long reach. For example the Kilo TT Pro comes with a R350 and the Kilo WT comes with a R556. As to the 510A suffix, see this as an example >>> http://www.velosolo.co.uk/tektro510.html Clearly external hex nut and longer reach.
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Last edited by TejanoTrackie; 11-28-11 at 08:22 AM. Reason: spelling and grammar
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Old 11-26-11, 09:28 PM   #6
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Thanks for the responses.

I'm trying to get the "Tektro: Economy Road Brake Set" from bikeisland.com for a friends build but want to make sure they are comparable to what I have on my bike.

I'll have to see if what they are selling is recessed or external nut. I had the 510A on my old Windsor Clockwork and it was recessed.

Thanks again!
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Old 11-28-11, 08:12 AM   #7
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I looked into this a little more and TT is correct. Tektro's 300 series should all have a 39-49mm (short) reach, while the 500 series should all be 47-57mm. The one I have came from BikeIsland's "economy" brake set and is definitely short reach witha recessed nut, so I'm sure they don't even know what they're selling (which doesn't really surprise me).

We've also got a 539 front caliper sitting around and it's definitely medium reach.
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Old 11-28-11, 11:52 AM   #8
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Originally Posted by Scrodzilla View Post
I looked into this a little more and TT is correct. Tektro's 300 series should all have a 39-49mm (short) reach, while the 500 series should all be 47-57mm. The one I have came from BikeIsland's "economy" brake set and is definitely short reach witha recessed nut, so I'm sure they don't even know what they're selling (which doesn't really surprise me).

We've also got a 539 front caliper sitting around and it's definitely medium reach.
Ok that's what I needed to know. Seems like what they refer to at 510A is something else.

Thanks for your help.
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