Velobuild AERO GRAV Frame

[BikerJens]

This might be a stupid question, but I'm new to bike builds..

I've ordered this frame (XL, in Pearl White - they say it will be shipped end August, I placed the order 15.08 if that info is important for any).

I was looking at going to 1x12 speed (Sensah SRX). BUT! I'm not sure that I understood bottom brackets and cranks correct.

I want to use this:
https://www.aliexpress.com/item/1005005817404883.html?spm=a2g0o.order_list.order_list_main.10.7bd51802aAVTKj

And this in 48T:
https://www.aliexpress.com/item/1005009609808654.html?spm=a2g0o.order_list.order_list_main.5.7bd51802aAVTKj

1. Is that possible?
2. What bottom bracket do I need?
3. Do I need any spacers?

[Blueberry]

This might be a stupid question, but I'm new to bike builds..

I've ordered this frame (XL, in Pearl White - they say it will be shipped end August, I placed the order 15.08 if that info is important for any).

I was looking at going to 1x12 speed (Sensah SRX). BUT! I'm not sure that I understood bottom brackets and cranks correct.

I want to use this:
https://www.aliexpress.com/item/1005005817404883.html?spm=a2g0o.order_list.order_list_main.10.7bd51802aAVTKj

And this in 48T:
https://www.aliexpress.com/item/1005009609808654.html?spm=a2g0o.order_list.order_list_main.5.7bd51802aAVTKj

1. Is that possible?
2. What bottom bracket do I need?
3. Do I need any spacers?

1. According to their website, a 48t 1x chainring in the front is too big. Their stated max is 44t.

2.Those links don't work for me but you need a T47 bottom bracket with inboard bearings and it needs to say that it is for whatever axle size your crank is. The main spindle diameters for a crank are 30mm, 24mm, and "dub" which is Sram's thing. Sometimes instead of saying 24mm, bottom brackets will just say something like "T47 internal bottom bracket for shimano." The "for Shimano" part just means it's for a 24mm spindle.

The crank should say something about being for road or gravel. Don't get anything that says MTB.

3. It depends. If you can cannot tighten the crank down enough to properly preload the bearings of the bottom bracket, you'll need to add spacers until you can.

[BikerJens]

1. According to their website, a 48t 1x chainring in the front is too big. Their stated max is 44t.

2.Those links don't work for me but you need a T47 bottom bracket with inboard bearings and it needs to say that it is for whatever axle size your crank is. The main spindle diameters for a crank are 30mm, 24mm, and "dub" which is Sram's thing. Sometimes instead of saying 24mm, bottom brackets will just say something like "T47 internal bottom bracket for shimano." The "for Shimano" part just means it's for a 24mm spindle.

The crank should say something about being for road or gravel. Don't get anything that says MTB.

3. It depends. If you can cannot tighten the crank down enough to properly preload the bearings of the bottom bracket, you'll need to add spacers until you can.

1. Yeah. I could start by learning how to read and look at the website first 

But could see someone trying with 48T in this tread. I’m just not clever enough to understand the conclusion.

2. Hm. Okay. Thank you. I will look around and see if this makes sense to me when looking at products.

3. Okay. Thanks.

[Blueberry]

1. Yeah. I could start by learning how to read and look at the website first 

But could see someone trying with 48T in this tread. I’m just not clever enough to understand the conclusion.

2. Hm. Okay. Thank you. I will look around and see if this makes sense to me when looking at products.

3. Okay. Thanks.

you could add spacers on the drive side to shift the chainring slightly more outboard/away from the bike so it fits, I believe that is what sbixify is doing. but it will change the chainline which could affect shifting a bit. It would probably just shift a little less smoothly in the lower gears you might be using while climbing. I usually avoid adding spacers to the drive side so I'm not messing with the intended chainline. You can often reach out to sellers/manufacturers to ask about chainline if you're not sure.

[BikerJens]

you could add spacers on the drive side to shift the chainring slightly more outboard/away from the bike so it fits, I believe that is what sbixify is doing. but it will change the chainline which could affect shifting a bit. It would probably just shift a little less smoothly in the lower gears you might be using while climbing. I usually avoid adding spacers to the drive side so I'm not messing with the intended chainline. You can often reach out to sellers/manufacturers to ask about chainline if you're not sure.

It sounds like it would better for me to go with something two chainrings. I actually have a ultegra 11 speed laying that might be helpful.

Then I just need to figure out what bb that I need for that.

[Chiyou]

Assuming you have a Shimano crankset, you'll want a bottom bracket that meets the following specifications:

T47 - because that's what your frame asks for
Inboard/Internal - that's also a frame consideration (your bottom bracket shell is 86.5 mm wide, which in turn means your BB bearings sit inboard/internal to the frame (as opposed to outboard/external))
24 - Shimano cranksets have a 24 mm axle diameter

Some manufacturers use very minimalistic product descriptions for this, e.g. T47-24I.

Here's a randomly-chosen example of what will work: https://www.tokenproducts.com/bottom-brackets/threaded/bb47v24

What you don't want:

Anything that isn't T47 (no BSA, no pressfit, no Italian threading)
Outboard/external cups or asymmetric cups (as a way of telling these apart: inboard cups have a narrow notched flange while outboard cups have a chunkier flange)
30 mm, 29 mm (SRAM DUB), 24/22 mm (SRAM GPX)

[BikerJens]

Assuming you have a Shimano crankset, you'll want a bottom bracket that meets the following specifications:

T47 - because that's what your frame asks for
Inboard/Internal - that's also a frame consideration (your bottom bracket shell is 86.5 mm wide, which in turn means your BB bearings sit inboard/internal to the frame (as opposed to outboard/external))
24 - Shimano cranksets have a 24 mm axle diameter

Some manufacturers use very minimalistic product descriptions for this, e.g. T47-24I.

Here's a randomly-chosen example of what will work: https://www.tokenproducts.com/bottom-brackets/threaded/bb47v24

What you don't want:

Anything that isn't T47 (no BSA, no pressfit, no Italian threading)
Outboard/external cups or asymmetric cups (as a way of telling these apart: inboard cups have a narrow notched flange while outboard cups have a chunkier flange)
30 mm, 29 mm (SRAM DUB), 24/22 mm (SRAM GPX)

Thank you very much! This is very helpful!

[awinner]

Frame arrived today. XS Raw carbon Gloss clear coat. weighs in at 1147g.

[Yoei802]

Sweet! What’s your build going to be??

[pavlo.k]

Finally received mine today. XL ordered on the 30th of May
Pros:
 - The quality seems really good overall. No paint overspray, headset cups are almost perfectly smooth and the bearings fit perfectly without rocking.
 - handlebar spacers are machined aluminum. Frankly it's heavier than plastic but I've had problems with spacers being too soft causing play and loosening headset in the past so I'll take alu any day.
 - you get an option off offset or no offset seatpost and I've got both
 - geo seems really good for me at least on the paper
 - it was very cheap
Cons:
  - I'm a little disappointed by the paintjob: I ordered a transparent green clear coat over the raw carbon but they used a lot of black paint to cover up some of the areas of the frame and the whole rear part of the bike including the bb is just plain black so the paint just looks like a "somewhat" green to black fade at best but In most light conditions it just looks completely black. It was a 60$ paint job so I got what I paid for.
 - the frame is very heavy. Without a rear derailleur hanger, with bottle cage bold and the front derailleur hanger it's 1247g
 - cockpit does not come with a computer mount
 - no di2 plugs or battery holder included

weights:
 Frame size XL 1247g
 Fork uncut 472g
 Cockpit 100x420 397g
 Seatpost 0mm offset 215g
 Seatpost 20mm offset 237g

[Whiteman83]

And here we go with another (XS size) frame that arrived today. Same feelings about the paint job - it was supposed to look like a satin/semi-matte finish, but it feels like it’s not finished I also ordered bottle cages and a computer mount, but I haven't found them in my box. Maybe I will repaint it over the wintertime. We will see. Now it is time to finish that build first.

[Mario kart]

My painted frame also looks awful. Rather have an unpainted frame than a poorly painted frame

[Motus]

I ordered it in matte black to be safe. From what I can see, the paint job isn't the best. Tons of orange peel.

[Whiteman83]

My painted frame also looks awful. Rather have an unpainted frame than a poorly painted frame

I would not call this awful It is a 60 $ paint job, so it is fine for this price. I just have a feeling that the last layer of satin/semi-matte varnish is missing. But maybe I am wrong. Overall, I'm happy that it is finally here 

[pavlo.k]

how do you install a derailleur hanger? It's supposed to rest on the stop on the frame when tightening but when installed like this it seems rotated too far forward and you can't actually get the wheel in