Weight Weenies

I am trying to find the right bottom bracket for my 2019 S-Works Venge in order to install a Sram Axs etap DUB crankset.

The frame has an OSBB bottom bracket, but it's unclear to me what the dimension of this is. Can not find dimensions on specialized.com

Is it BB30, PF30, BB30a or PF30a.

Measurering the width is 63mm, but searching for DUB BB30 I would have to choose between 68 or 73mm.
Searching for DUB PF30 I would have to choose between 78mm or 83mm.

Can any one help me out?

The Venge and Tarmac use BB30. you will just be pressing in bearings against the circlips in the shell then using spacers to make up the difference.

Visit starbike.com Online Retailer for HighEnd cycling components
Great Prices ✓    Broad Selection ✓    Worldwide Delivery ✓

www.starbike.com

Dub BB30 regular will fit perfectly. The frame is 68mm wide and the new OSBB is usual BB30. How did you measure the width to 63mm?

Dub BB30 68mm is the correct one.

Go to bbinfinite.com. they have a click thru flow chart. Measure the DIAMETER of the hole. One is 42. One is 46. Specialized sucks because they use both bb30 and pf30 and call it the same thing,OSBB, because their marketing team is retarded.

On my crux, i hacksawed out the ridiculous bonded-in aluminum bb30 cups and run a bbinfinite pf30 module.

FactoryMatt wrote: ↑

Sat Dec 07, 2019 8:42 pm

Go to bbinfinite.com. they have a click thru flow chart. Measure the DIAMETER of the hole. One is 42. One is 46. Specialized sucks because they use both bb30 and pf30 and call it the same thing,OSBB, because their marketing team is retarded.

On my crux, i hacksawed out the ridiculous bonded-in aluminum bb30 cups and run a bbinfinite pf30 module.

Thanks

Kingston wrote: ↑

Sat Dec 07, 2019 9:01 pm

FactoryMatt wrote: ↑

Sat Dec 07, 2019 8:42 pm

Go to bbinfinite.com. they have a click thru flow chart. Measure the DIAMETER of the hole. One is 42. One is 46. Specialized sucks because they use both bb30 and pf30 and call it the same thing,OSBB, because their marketing team is retarded.

On my crux, i hacksawed out the ridiculous bonded-in aluminum bb30 cups and run a bbinfinite pf30 module.

Thanks

There's no need to measure. It's BB30 68mm.

Anyone tried the Hope 29mm DUB bottom bracket converstion kit, looks interesting and seems to retain the original BB30 bearings

Bigmac wrote: ↑

Mon Dec 09, 2019 8:55 am

Anyone tried the Hope 29mm DUB bottom bracket converstion kit, looks interesting and seems to retain the original BB30 bearings

A lot of DUB BBs are just 6806 bearings with 1mm reducers/shims. This Hope kit is more of the same + a 2mm spacer to take up any axial play.

Even DUB BBs with bearings that don't use reducers...they're basically 6806 bearings with 1mm thicker inner races and the same sized balls.

DO NOT BUY THE STOCK SRAM DUB BB! It uses nonstandard bearings that are smaller outer diameter for some stupid reason. My brand new Sram bb30 to dub BB wouldn't even spin a full revolution and the bearings felt gritty. I was unable to use the stock ceramic speed 6806 bearings to replace them with too. Get some good 6806 bearings with the inner sleeve.

bbinfinite makes great stuff and I'm super happy with the one-piece OSBB PF that I installed in my S-Works Roubaix.

Just a little update from OP.

The certified Specialized store where I bought the Venge, told me to get a 46x68 DUB Pressfit BB. That does not fit, since the frame has alloy housing for installing BB30 bearing. So the dimension is 42x68. The alloy housing can't be removed, with a saw

I bought a Sram DUB BB30 bottom bracket which is now installed. There might be better option, that I am not aware of.

TobinHatesYou wrote: ↑

Mon Dec 09, 2019 9:02 am

A lot of DUB BBs are just 6806 bearings with 1mm reducers/shims. This Hope kit is more of the same + a 2mm spacer to take up any axial play.

Even DUB BBs with bearings that don't use reducers...they're basically 6806 bearings with 1mm thicker inner races and the same sized balls.

Oh god. First GXP with a free floating side and now this? Before reading this I actually thought DUB wouldn't be so bad, but as it seems they just reinvented the shims to sell a new axle and modified bearings .

Kingston wrote: ↑

Fri Jan 03, 2020 1:58 pm

Just a little update from OP.

The certified Specialized store where I bought the Venge, told me to get a 46x68 DUB Pressfit BB. That does not fit, since the frame has alloy housing for installing BB30 bearing. So the dimension is 42x68. The alloy housing can't be removed, with a saw

I bought a Sram DUB BB30 bottom bracket which is now installed. There might be better option, that I am not aware of.

That's what I wrote yes, have mounted a few. Did you buy the bb at the Specialized store too or what did they say after it didn't fit?

Bigmac wrote: ↑

Mon Dec 09, 2019 8:55 am

Anyone tried the Hope 29mm DUB bottom bracket converstion kit, looks interesting and seems to retain the original BB30 bearings

I am interested in that topic as well. Somebody has tried the Hope DUB conversion kit with normal BB30 bearings?
Chris King also offers a DUB conversion kit.

Visit starbike.com Online Retailer for HighEnd cycling components
Great Prices ✓    Broad Selection ✓    Worldwide Delivery ✓

www.starbike.com

Will this work with my 2019 Venge for Sram Red AXS crank?
https://imgur.com/oHEOoyx