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Anyone have issues with the Trek T47 Bearings?

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Anyone have issues with the Trek T47 Bearings?

Old 12-10-21, 05:09 PM
  #26  
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Originally Posted by Rusty Peters View Post
I have had an issue with the Praxis BB but not with the bearings. My Domane SL5 has a dreaded bottom bracket click that can be eliminated by cleaning and regreasing the bb spindle. The bearings are still very smooth but they are marking up the bb spindle pretty badly. Something is moving, causing the creak. Bike has ~8000 miles on it and bb issues have been present from 1000 miles. A Chris King BB keeps things quiet but seems to bind in one spot and has worn out the bearing sleeves. Before I put new sleeves into the Chris King, I would like to get to the rood cause of the issue.

Facing and bb shell threading were questioned above. What should I look for if that is a problem? Would my local Trek store be able to diagnose an alignment problem?
have you retightened it?
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Old 12-10-21, 05:35 PM
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I did tighten everything up and adjusted it properly. Even if the preload is set on the high side, it will start making noise within 150 miles.
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Old 12-10-21, 06:42 PM
  #28  
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Originally Posted by Rusty Peters View Post
I have had an issue with the Praxis BB but not with the bearings. My Domane SL5 has a dreaded bottom bracket click that can be eliminated by cleaning and regreasing the bb spindle. The bearings are still very smooth but they are marking up the bb spindle pretty badly. Something is moving, causing the creak. Bike has ~8000 miles on it and bb issues have been present from 1000 miles. A Chris King BB keeps things quiet but seems to bind in one spot and has worn out the bearing sleeves. Before I put new sleeves into the Chris King, I would like to get to the rood cause of the issue.

Facing and bb shell threading were questioned above. What should I look for if that is a problem? Would my local Trek store be able to diagnose an alignment problem?
wonder if your BB is not perfectly straight causing the creaking. the single piece units take care of that stuff
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Old 12-16-21, 08:25 AM
  #29  
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Thank you for the help. It looks like a BBinfinite unit will be the next step if I want to solve the problem for good. Now the tough question...sell the bike or invest in the BB...
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Old 12-16-21, 03:31 PM
  #30  
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Originally Posted by Rusty Peters View Post
Thank you for the help. It looks like a BBinfinite unit will be the next step if I want to solve the problem for good. Now the tough question...sell the bike or invest in the BB...
LOL... it was worth the $200 for silent operation and buttery smooth spinning
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Old 12-21-21, 07:06 AM
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The Praxis works fine for me on my Domane but it probably has only seem a light drizzle once in its lifetime. It's my fair weather bike.

There have been a few threads on this very topic and me wanting to be prepared, I picked up a Hambini bottom bracket with his installation tool. It is a one piece design and it feels like jewelry in your hand.

The down side is the price, it is spendy. Second, not any fault of Hambini as it was shipped immediately, but it took almost a month to get to me in Toronto, Canada. Tracking the package showed me it sat more time in postal offices than actually traveling. I am sure the pandemic has played havoc with both countries postal services.

Mine will get installed in the spring after the snow melts. For now the Praxis will be fine for my bike that sits on a trainer.
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Old 12-21-21, 01:08 PM
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Hambini Racing's T47i T47 Bottom Bracket for the Shimano Crankset (Trek) lists a 86.5, but the Domane shows a Praxis, T47 threaded, internal bearing spec'd to 85.5. What am I missing?
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Old 12-21-21, 01:45 PM
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Originally Posted by Rusty Peters View Post
I have had an issue with the Praxis BB but not with the bearings. My Domane SL5 has a dreaded bottom bracket click that can be eliminated by cleaning and regreasing the bb spindle. The bearings are still very smooth but they are marking up the bb spindle pretty badly. Something is moving, causing the creak. Bike has ~8000 miles on it and bb issues have been present from 1000 miles. A Chris King BB keeps things quiet but seems to bind in one spot and has worn out the bearing sleeves. Before I put new sleeves into the Chris King, I would like to get to the rood cause of the issue.

Facing and bb shell threading were questioned above. What should I look for if that is a problem? Would my local Trek store be able to diagnose an alignment problem?
The creak is likely the spindle moving inside the bearing. That would also account for marking of the spindle. Some crank/spindle designs, most notably Shimano, has a plastic sleeve between the bearing and the axle (and a steel axle) that in tandem prevents this issue. Other metal to metal designs need some "slop" to allow for assembly and to compound the issue, the axle is often aluminium alloy. Allowing for creaking and rubbing.
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Old 12-21-21, 10:01 PM
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Originally Posted by Troul View Post
Hambini Racing's T47i T47 Bottom Bracket for the Shimano Crankset (Trek) lists a 86.5, but the Domane shows a Praxis, T47 threaded, internal bearing spec'd to 85.5. What am I missing?
He says it works https://www.hambini.com/product/t47-...ottom-bracket/

From the website listed above
This bottom bracket is designed to interface a Shimano 24mm Hollowtech 2 Crankset with a bike frame that uses a T47 Bottom Bracket (86.5mm wide). This is often called threadfit or T47i and a variant of this is used on Trek bikes.
  • T47 x 86.5 Threaded. 47×1.0mm
  • Will work with TREK T47i bikes, these have an 85.5mm wide shell
I will tell you in the spring if it doesn't because that is when I am installing mine.

Last edited by blakcloud; 12-21-21 at 10:02 PM. Reason: Fixed link
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Old 12-22-21, 07:38 AM
  #35  
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Originally Posted by Troul View Post
Hambini Racing's T47i T47 Bottom Bracket for the Shimano Crankset (Trek) lists a 86.5, but the Domane shows a Praxis, T47 threaded, internal bearing spec'd to 85.5. What am I missing?
I believe the T47 being threaded, will account for anything 85 and 86.5 for the internal Bearing versions.
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Old 01-17-22, 09:21 AM
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Originally Posted by jaxgtr View Post
Yep, looked at the Wheels MFG, but they were not in stock, so went with the BBInfinite. Went out today and got in 63 and really noticed a different in how easy the crank spun. I found myself in higher gears than I typically ride. I generally live in the 16,17,18 tooth with an occasional swing through 15 land using a 14-28 cog with a 50 tooth front. I like the 14-28 since I have no hills and I like having one tooth adjustments when the wind kicks up. I found my self in the 14-17 range a lot today, even though the wind out of the N and NE was pretty strong and in some spots, I did not have anywhere else to go, since my 14 tooth was all I had. Might need to switch back to a 11-28 or a 11-25 since I like a 16 tooth cog.

Since this just the first ride, I will have to get some more time in to see if this was just an anomaly, or do I order a new cassette an 11-25.
Did you go steel or ceramic?
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Old 01-17-22, 10:19 AM
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Originally Posted by Mojo31 View Post
Did you go steel or ceramic?
I went with the Ceramitec bearings. The price difference between the 2 was not bad, so I figured why not. It looks like they had a price increase since I bought mine. I want to say I got it for less than 235.
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Old 01-17-22, 10:23 AM
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Originally Posted by jaxgtr View Post
I went with the Ceramitec bearings. The price difference between the 2 was not bad, so I figured why not. It looks like they had a price increase since I bought mine. I want to say I got it for less than 235.
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Old 01-17-22, 11:43 AM
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One more - what size jockey wheels did you get?
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Old 01-17-22, 02:25 PM
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Originally Posted by Mojo31 View Post
One more - what size jockey wheels did you get?
I have Ultegra Di2, so I went with the 12/14 and did not need to make any adjustments to my chain length
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Old 01-17-22, 02:37 PM
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Originally Posted by jaxgtr View Post
I have Ultegra Di2, so I went with the 12/14 and did not need to make any adjustments to my chain length
Gracias!
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Old 03-17-22, 08:57 AM
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Any updates?

Also, are those Hambini Racing T47i T47-86.5 Bottom Bracket Shimano Crankset (Trek) kits only sold thru the one site, or is there a reputable state side vendor?
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Old 03-17-22, 06:33 PM
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Originally Posted by jaxgtr View Post
I have Ultegra Di2, so I went with the 12/14 and did not need to make any adjustments to my chain length
Followed your lead on the BB and jockey wheels. 👍
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Old 03-17-22, 06:51 PM
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Originally Posted by Troul View Post
Any updates?

Also, are those Hambini Racing T47i T47-86.5 Bottom Bracket Shimano Crankset (Trek) kits only sold thru the one site, or is there a reputable state side vendor?
I believe you can only get them through Hambini's site.
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Old 03-18-22, 01:34 AM
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Originally Posted by jaxgtr View Post
I believe you can only get them through Hambini's site.
That's what I figured, & pulled the cyber trigger on it. I don't have a need for it now, but I don't want to get caught with my pedals down!
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Old 03-18-22, 08:23 PM
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Ceramic isn't an option when placing an order. I assume you went with sealed & sourced the Ceramic a la carte?
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Old 03-18-22, 08:31 PM
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Jaxgtr bought BBinfiniti Ceramictech.
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Old 03-18-22, 08:35 PM
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Oh poop lol
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Old 03-18-22, 08:39 PM
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https://www.bbinfinite.com/products/...ottom-brackets

About the same cost as hambs. I'll be giving it a shot when the bb fails.
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Old 03-18-22, 10:15 PM
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Originally Posted by Troul View Post
https://www.bbinfinite.com/products/...ottom-brackets

About the same cost as hambs. I'll be giving it a shot when the bb fails.

Yep, I was in more of a need at the moment, so I chose the BBInfinite over the Hambini just due to the time it was going to take to get here. I had the Biinfinite in 3 days. Can't go wrong with either one.
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