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Trek BB86.5 bearing replacement

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Trek BB86.5 bearing replacement

Old 06-18-19, 08:14 AM
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Dan333SP
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Trek BB86.5 bearing replacement

I've got a 2013 Madone 3 series. Looks like the BB is Trek's press-fit BB86.5 standard and I've got a SRAM GXP crankset on the bike. From what I can tell, I can just tap out the bearings from the shell using a bearing removal tool, and then pop the new ones in. The existing bearings are original and running rough/creaky.

Is it correct that I can just tap in the new bearings once the old ones are removed? I found the following on Park Tool's website:

The Trek® Bicycle Company uses a proprietary bottom bracket design on some model bikes called the BB90. The crankset system is effectively the BB92 style, however the bearings themselves are different (figure 12). The bearings have no plastic retainer or cups. These bearings are a mild press fit into the bottom bracket shell. The cartridge bearing are 37mm outside diameter and 24mm inside diameter to accept the Shimano® Hollowtech® II cranksets. For SRAM® GXP® cranks, the left bearing has a 22mm diameter.

The cranks are removed with normal procedures. Use the BBT-90.3 driver to tap out each bearing. The bearing seat inside the shell cannot be removed.


Slightly confused because my bike is apparently BB86.5 rather than BB90, so I wanted to make sure the procedure would be the same and that these bearings would fit-

https://www.ebay.com/itm/Enduro-SRAM...EAAOSw5V1bYIWL
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Old 06-19-19, 09:05 AM
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Seems like this one may just be a job for our local Trek shop. FWIW, turns out the creaking was actually my front skewer, but the BB bearings still need to be replaced. Just means I can wait a bit longer
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Old 06-19-19, 03:34 PM
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Pick a standard, any standard. http://pardo.net/bike/pic/mobi/b.bot...standards.html
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Old 06-19-19, 09:53 PM
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https://www.qbp.com/diagrams/TechInf...bbfitchart.pdf
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Old 06-19-19, 09:58 PM
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ID, OD and thickness gets you a reference number,. by measuring..
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Old 06-20-19, 09:19 AM
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Originally Posted by Dan333SP View Post
I've got a 2013 Madone 3 series. Looks like the BB is Trek's press-fit BB86.5 standard and I've got a SRAM GXP crankset on the bike. From what I can tell, I can just tap out the bearings from the shell using a bearing removal tool, and then pop the new ones in. The existing bearings are original and running rough/creaky.

Is it correct that I can just tap in the new bearings once the old ones are removed? I found the following on Park Tool's website:

The Trek® Bicycle Company uses a proprietary bottom bracket design on some model bikes called the BB90. The crankset system is effectively the BB92 style, however the bearings themselves are different (figure 12). The bearings have no plastic retainer or cups. These bearings are a mild press fit into the bottom bracket shell. The cartridge bearing are 37mm outside diameter and 24mm inside diameter to accept the Shimano® Hollowtech® II cranksets. For SRAM® GXP® cranks, the left bearing has a 22mm diameter.

The cranks are removed with normal procedures. Use the BBT-90.3 driver to tap out each bearing. The bearing seat inside the shell cannot be removed.


Slightly confused because my bike is apparently BB86.5 rather than BB90, so I wanted to make sure the procedure would be the same and that these bearings would fit-
On your bike, the BB width is correct at 86.5mm which is paired with your SRAM S350 Crankset. For a replacement BB, you can order part number 00.6415.033.000 which is the one you linked.

Tapping out the BB with a removal tool is easy and expect it to shoot across the room. For installing, using a bearing press it best as it will aid both sides to enter into the frame straight. Wheels Manufacturing makes one that isn't too costly if you like to wrench at home. Otherwise, it is a quick job at your local Trek dealer!
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Old 06-20-19, 10:19 AM
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Originally Posted by Mitch@Trek View Post
On your bike, the BB width is correct at 86.5mm which is paired with your SRAM S350 Crankset. For a replacement BB, you can order part number 00.6415.033.000 which is the one you linked.

Tapping out the BB with a removal tool is easy and expect it to shoot across the room. For installing, using a bearing press it best as it will aid both sides to enter into the frame straight. Wheels Manufacturing makes one that isn't too costly if you like to wrench at home. Otherwise, it is a quick job at your local Trek dealer!
Nice! Thanks for checking this forum, always appreciate manufacturer feedback!
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Old 06-20-19, 12:04 PM
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Originally Posted by Dan333SP View Post
Nice! Thanks for checking this forum, always appreciate manufacturer feedback!
No problem! I'll be around whenever you (or anyone) needs me!
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