T47 bottom bracket vs SRAM
79 views
Skip to first unread message
fran...@edelbikes.com
Apr 2, 2018, 1:53:18 PM4/2/18
to Framebuilders
Hi all,
I need some help from the guys who have some experience with T47:
I have just shipped a frame to customer, which has a 68mm T47 bottom
bracket. I also provided him a White Industries BB with external
bearings.
Now he's trying to install a road PF30 SRAM crankset (I think it's Red
stuff) and he tells me that the spindle length of the crankset is too
short to be able to install it correctly.
From what I could find, a PF30 road crankset usually requires 86.5 BB +
~3mm for the pressfit edge = ~89.5mm.
With the T47, it looks like we have 68mm for the BB + 2 x ~15mm of
external bearings = 98mm !
Is there a different, narrower bottom bracket that would fit ?
Thanks for your help !!!
Francois
I need some help from the guys who have some experience with T47:
I have just shipped a frame to customer, which has a 68mm T47 bottom
bracket. I also provided him a White Industries BB with external
bearings.
Now he's trying to install a road PF30 SRAM crankset (I think it's Red
stuff) and he tells me that the spindle length of the crankset is too
short to be able to install it correctly.
From what I could find, a PF30 road crankset usually requires 86.5 BB +
~3mm for the pressfit edge = ~89.5mm.
With the T47, it looks like we have 68mm for the BB + 2 x ~15mm of
external bearings = 98mm !
Is there a different, narrower bottom bracket that would fit ?
Thanks for your help !!!
Francois
Michael Catano
Apr 2, 2018, 1:57:59 PM4/2/18
to fran...@edelbikes.com, Framebuilders
You probably need internal bearing cups: https://wheelsmfg.com/bottom-brackets/t47/t47-angular-contact-bb-for-30mm-cranks-black.html
m
--
--
You received this message because you are subscribed to the Google
Groups "Framebuilders" group.
Searchable archives for this group can be found at http://groups.google.com/group/framebuilders (recent content) and http://search.bikelist.org (older content).
To post to this group, send email to frameb...@googlegroups.com
To unsubscribe from this group, send email to
framebuilders+unsubscribe@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/framebuilders?hl=en
--- You received this message because you are subscribed to the Google Groups "Framebuilders" group.
To unsubscribe from this group and stop receiving emails from it, send an email to framebuilders+unsubscribe@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
fran...@edelbikes.com
Apr 2, 2018, 2:06:41 PM4/2/18
to Michael Catano, Framebuilders
Yep, but I guess in that case I will need something like 8mm of spacers
on the crank axle... I don't know where I missed something, but I'm
surprised there's not a cleaner solution.
On 2018-04-02 19:57, Michael Catano wrote:
> You probably need internal bearing cups:
> https://wheelsmfg.com/bottom-brackets/t47/t47-angular-contact-bb-for-30mm-cranks-black.html
> [5]
>> and http://search.bikelist.org [2] (older content).
>> For more options, visit https://groups.google.com/d/optout [4].
> http://search.bikelist.org [2] (older content).
> For more options, visit https://groups.google.com/d/optout [4].
>
>
> Links:
> ------
> [1] http://groups.google.com/group/framebuilders
> [2] http://search.bikelist.org
> [3] http://groups.google.com/group/framebuilders?hl=en
> [4] https://groups.google.com/d/optout
> [5]
> https://wheelsmfg.com/bottom-brackets/t47/t47-angular-contact-bb-for-30mm-cranks-black.html
on the crank axle... I don't know where I missed something, but I'm
surprised there's not a cleaner solution.
On 2018-04-02 19:57, Michael Catano wrote:
> You probably need internal bearing cups:
> https://wheelsmfg.com/bottom-brackets/t47/t47-angular-contact-bb-for-30mm-cranks-black.html
>
> m
>
> On Mon, Apr 2, 2018 at 12:53 PM, <fran...@edelbikes.com> wrote:
>
>> Hi all,
>> I need some help from the guys who have some experience with T47:
>> I have just shipped a frame to customer, which has a 68mm T47 bottom
>> bracket. I also provided him a White Industries BB with external
>> bearings.
>> Now he's trying to install a road PF30 SRAM crankset (I think it's
>> Red stuff) and he tells me that the spindle length of the crankset
>> is too short to be able to install it correctly.
>> From what I could find, a PF30 road crankset usually requires 86.5
>> BB + ~3mm for the pressfit edge = ~89.5mm.
>> With the T47, it looks like we have 68mm for the BB + 2 x ~15mm of
>> external bearings = 98mm !
>>
>> Is there a different, narrower bottom bracket that would fit ?
>>
>> Thanks for your help !!!
>> Francois
>>
>> --
>> --
>> You received this message because you are subscribed to the Google
>> Groups "Framebuilders" group.
>>
>> Searchable archives for this group can be found at
>> http://groups.google.com/group/framebuilders [1] (recent content)
> m
>
> On Mon, Apr 2, 2018 at 12:53 PM, <fran...@edelbikes.com> wrote:
>
>> Hi all,
>> I need some help from the guys who have some experience with T47:
>> I have just shipped a frame to customer, which has a 68mm T47 bottom
>> bracket. I also provided him a White Industries BB with external
>> bearings.
>> Now he's trying to install a road PF30 SRAM crankset (I think it's
>> Red stuff) and he tells me that the spindle length of the crankset
>> is too short to be able to install it correctly.
>> From what I could find, a PF30 road crankset usually requires 86.5
>> BB + ~3mm for the pressfit edge = ~89.5mm.
>> With the T47, it looks like we have 68mm for the BB + 2 x ~15mm of
>> external bearings = 98mm !
>>
>> Is there a different, narrower bottom bracket that would fit ?
>>
>> Thanks for your help !!!
>> Francois
>>
>> --
>> --
>> You received this message because you are subscribed to the Google
>> Groups "Framebuilders" group.
>>
>> Searchable archives for this group can be found at
>> and http://search.bikelist.org [2] (older content).
>>
>> To post to this group, send email to frameb...@googlegroups.com
>> To unsubscribe from this group, send email to
>> framebuilder...@googlegroups.com
>> To post to this group, send email to frameb...@googlegroups.com
>> To unsubscribe from this group, send email to
>> For more options, visit this group at
>> http://groups.google.com/group/framebuilders?hl=en [3]
>>
>> --- You received this message because you are subscribed to the
>> Google Groups "Framebuilders" group.
>> To unsubscribe from this group and stop receiving emails from it,
>> send an email to framebuilder...@googlegroups.com.
>> --- You received this message because you are subscribed to the
>> Google Groups "Framebuilders" group.
>> To unsubscribe from this group and stop receiving emails from it,
>> For more options, visit https://groups.google.com/d/optout [4].
>
> --
> --
> You received this message because you are subscribed to the Google
> Groups "Framebuilders" group.
>
> Searchable archives for this group can be found at
> http://groups.google.com/group/framebuilders [1] (recent content) and
> --
> --
> You received this message because you are subscribed to the Google
> Groups "Framebuilders" group.
>
> Searchable archives for this group can be found at
> http://search.bikelist.org [2] (older content).
>
> To post to this group, send email to frameb...@googlegroups.com
> To unsubscribe from this group, send email to
> framebuilder...@googlegroups.com
> To post to this group, send email to frameb...@googlegroups.com
> To unsubscribe from this group, send email to
> For more options, visit this group at
> http://groups.google.com/group/framebuilders?hl=en [3]
>
> ---
> You received this message because you are subscribed to the Google
> Groups "Framebuilders" group.
> To unsubscribe from this group and stop receiving emails from it, send
> an email to framebuilder...@googlegroups.com.
> ---
> You received this message because you are subscribed to the Google
> Groups "Framebuilders" group.
> To unsubscribe from this group and stop receiving emails from it, send
> For more options, visit https://groups.google.com/d/optout [4].
>
>
> Links:
> ------
> [1] http://groups.google.com/group/framebuilders
> [2] http://search.bikelist.org
> [3] http://groups.google.com/group/framebuilders?hl=en
> [4] https://groups.google.com/d/optout
> [5]
> https://wheelsmfg.com/bottom-brackets/t47/t47-angular-contact-bb-for-30mm-cranks-black.html
brooklyn fowler
Apr 2, 2018, 2:15:33 PM4/2/18
to fran...@edelbikes.com, Framebuilders
Hi Francois,
See the crank user manual for SRAM cranks, which describes spacer configurations for SRAM road cranks and BB types.
The spacer/Preload Adjuster kits generally come with the cranksets, but also can be sourced separately if necessary.
-Brooklyn
Searchable archives for this group can be found at http://groups.google.com/group/framebuilders (recent content) and http://search.bikelist.org (older content).
To post to this group, send email to frameb...@googlegroups.com
To unsubscribe from this group, send email to
framebuilder...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/framebuilders?hl=en
---
You received this message because you are subscribed to the Google Groups "Framebuilders" group.
To unsubscribe from this group and stop receiving emails from it, send an email to framebuilder...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
Wissahickon Cyclery
Apr 2, 2018, 2:34:10 PM4/2/18
to fran...@edelbikes.com, Framebuilders
SRAM road will only work with external bearings if it is GXP. All 30mm spindle cranks on the road require internal bearings. The new DUB cranks on the mtb side have resolved the 30mm spindle issue. So a 73/92 system will work with a DUB crank unlike before it required an internal bearing 73 for 30mm and external bearing worked in 74 with GXP only. I suspect the DUB will find its way to the road thing as well but it is not there yet. You sent the wrong BB for the 30mm spindle road crank. Also unlike what Wheels is selling there is a subtle difference between internal bearing cups from 68/73 and 86/92. They work in each other but White Industries has a specific cup for each application.
-Drew
--
--
You received this message because you are subscribed to the Google
Groups "Framebuilders" group.
Searchable archives for this group can be found at http://groups.google.com/group/framebuilders (recent content) and http://search.bikelist.org (older content).
To post to this group, send email to frameb...@googlegroups.com
To unsubscribe from this group, send email to
For more options, visit this group at
http://groups.google.com/group/framebuilders?hl=en
--- You received this message because you are subscribed to the Google Groups "Framebuilders" group.
To unsubscribe from this group and stop receiving emails from it, send an email to framebuilders+unsubscribe@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
Drew Guldalian
D.B.A. Engin Cycles
Wissahickon Cyclery
7837 Germantown Ave Phila,PA 19118
www.wiss-cycles.com
www.engincycles.com
Wissahickon Cyclery
7837 Germantown Ave Phila,PA 19118
www.wiss-cycles.com
www.engincycles.com
fran...@edelbikes.com
Apr 2, 2018, 2:59:17 PM4/2/18
to Wissahickon Cyclery, Framebuilders
Thanks ! Much clearer now !
On 2018-04-02 20:34, Wissahickon Cyclery wrote:
> SRAM road will only work with external bearings if it is GXP. All
> 30mm spindle cranks on the road require internal bearings. The new
> DUB cranks on the mtb side have resolved the 30mm spindle issue. So a
> 73/92 system will work with a DUB crank unlike before it required an
> internal bearing 73 for 30mm and external bearing worked in 74 with
> GXP only. I suspect the DUB will find its way to the road thing as
> well but it is not there yet. You sent the wrong BB for the 30mm
> spindle road crank. Also unlike what Wheels is selling there is a
> subtle difference between internal bearing cups from 68/73 and 86/92.
> They work in each other but White Industries has a specific cup for
> each application.
>
> -Drew
>
> [5]
> Virus-free. www.avast.com [6]
>> and http://search.bikelist.org [2] (older content).
>> For more options, visit https://groups.google.com/d/optout [4].
> www.engincycles.com [8]
> http://search.bikelist.org [2] (older content).
> [6]
> https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=link
> [7] http://www.wiss-cycles.com
> [8] http://www.engincycles.com
On 2018-04-02 20:34, Wissahickon Cyclery wrote:
> SRAM road will only work with external bearings if it is GXP. All
> 30mm spindle cranks on the road require internal bearings. The new
> DUB cranks on the mtb side have resolved the 30mm spindle issue. So a
> 73/92 system will work with a DUB crank unlike before it required an
> internal bearing 73 for 30mm and external bearing worked in 74 with
> GXP only. I suspect the DUB will find its way to the road thing as
> well but it is not there yet. You sent the wrong BB for the 30mm
> spindle road crank. Also unlike what Wheels is selling there is a
> subtle difference between internal bearing cups from 68/73 and 86/92.
> They work in each other but White Industries has a specific cup for
> each application.
>
> -Drew
>
> Virus-free. www.avast.com [6]
>
> On Mon, Apr 2, 2018 at 1:53 PM, <fran...@edelbikes.com> wrote:
>
>> Hi all,
>> I need some help from the guys who have some experience with T47:
>> I have just shipped a frame to customer, which has a 68mm T47 bottom
>> bracket. I also provided him a White Industries BB with external
>> bearings.
>> Now he's trying to install a road PF30 SRAM crankset (I think it's
>> Red stuff) and he tells me that the spindle length of the crankset
>> is too short to be able to install it correctly.
>> From what I could find, a PF30 road crankset usually requires 86.5
>> BB + ~3mm for the pressfit edge = ~89.5mm.
>> With the T47, it looks like we have 68mm for the BB + 2 x ~15mm of
>> external bearings = 98mm !
>>
>> Is there a different, narrower bottom bracket that would fit ?
>>
>> Thanks for your help !!!
>> Francois
>>
>> --
>> --
>> You received this message because you are subscribed to the Google
>> Groups "Framebuilders" group.
>>
>> Searchable archives for this group can be found at
>> http://groups.google.com/group/framebuilders [1] (recent content)
> On Mon, Apr 2, 2018 at 1:53 PM, <fran...@edelbikes.com> wrote:
>
>> Hi all,
>> I need some help from the guys who have some experience with T47:
>> I have just shipped a frame to customer, which has a 68mm T47 bottom
>> bracket. I also provided him a White Industries BB with external
>> bearings.
>> Now he's trying to install a road PF30 SRAM crankset (I think it's
>> Red stuff) and he tells me that the spindle length of the crankset
>> is too short to be able to install it correctly.
>> From what I could find, a PF30 road crankset usually requires 86.5
>> BB + ~3mm for the pressfit edge = ~89.5mm.
>> With the T47, it looks like we have 68mm for the BB + 2 x ~15mm of
>> external bearings = 98mm !
>>
>> Is there a different, narrower bottom bracket that would fit ?
>>
>> Thanks for your help !!!
>> Francois
>>
>> --
>> --
>> You received this message because you are subscribed to the Google
>> Groups "Framebuilders" group.
>>
>> Searchable archives for this group can be found at
>> and http://search.bikelist.org [2] (older content).
>>
>> To post to this group, send email to frameb...@googlegroups.com
>> To unsubscribe from this group, send email to
>> framebuilder...@googlegroups.com
>> To post to this group, send email to frameb...@googlegroups.com
>> To unsubscribe from this group, send email to
>> For more options, visit this group at
>> http://groups.google.com/group/framebuilders?hl=en [3]
>>
>> --- You received this message because you are subscribed to the
>> Google Groups "Framebuilders" group.
>> To unsubscribe from this group and stop receiving emails from it,
>> send an email to framebuilder...@googlegroups.com.
>> --- You received this message because you are subscribed to the
>> Google Groups "Framebuilders" group.
>> To unsubscribe from this group and stop receiving emails from it,
>> For more options, visit https://groups.google.com/d/optout [4].
>
> --
>
> Drew Guldalian
> D.B.A. Engin Cycles
> Wissahickon Cyclery
> 7837 Germantown Ave Phila,PA 19118
> www.wiss-cycles.com [7]
> --
>
> Drew Guldalian
> D.B.A. Engin Cycles
> Wissahickon Cyclery
> 7837 Germantown Ave Phila,PA 19118
> www.engincycles.com [8]
>
> --
> --
> You received this message because you are subscribed to the Google
> Groups "Framebuilders" group.
>
> Searchable archives for this group can be found at
> http://groups.google.com/group/framebuilders [1] (recent content) and
> --
> --
> You received this message because you are subscribed to the Google
> Groups "Framebuilders" group.
>
> Searchable archives for this group can be found at
> http://search.bikelist.org [2] (older content).
>
> To post to this group, send email to frameb...@googlegroups.com
> To unsubscribe from this group, send email to
> framebuilder...@googlegroups.com
> To post to this group, send email to frameb...@googlegroups.com
> To unsubscribe from this group, send email to
> For more options, visit this group at
> http://groups.google.com/group/framebuilders?hl=en [3]
>
> ---
> You received this message because you are subscribed to the Google
> Groups "Framebuilders" group.
> To unsubscribe from this group and stop receiving emails from it, send
> an email to framebuilder...@googlegroups.com.
> ---
> You received this message because you are subscribed to the Google
> Groups "Framebuilders" group.
> To unsubscribe from this group and stop receiving emails from it, send
> For more options, visit https://groups.google.com/d/optout [4].
>
>
> Links:
> ------
> [1] http://groups.google.com/group/framebuilders
> [2] http://search.bikelist.org
> [3] http://groups.google.com/group/framebuilders?hl=en
> [4] https://groups.google.com/d/optout
> [5]
> https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=icon
>
>
> Links:
> ------
> [1] http://groups.google.com/group/framebuilders
> [2] http://search.bikelist.org
> [3] http://groups.google.com/group/framebuilders?hl=en
> [4] https://groups.google.com/d/optout
> [5]
> [6]
> https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=link
> [7] http://www.wiss-cycles.com
> [8] http://www.engincycles.com
jo...@clockworkbikes.com
Apr 2, 2018, 3:30:16 PM4/2/18
to Framebuilders
T47 with internal BB and SRAM road crank.
https://www.flickr.com/photos/clockworkbikes/38332689365/in/album-72157687728172581/
https://www.flickr.com/photos/clockworkbikes/38332689365/in/album-72157687728172581/
Reply all
Reply to author
Forward
0 new messages