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Re: Velobuild AERO GRAV Frame
Hi, first time poster on the forum here. I have been reading here for a while and got tempted to make a gravel bike. Parts and frame are ordered, so a good day to sign up here and get involved. I’m a 193cm tall and around 100 kilo, I have been riding mountain bikes for a few years but need something a bit more speedy. This build will be used for commutes on tarmac and gravel.
This is my first build, so I might have done some dumb choices or forgotten something important, but hopefully my

Aero Grav XL, +2 cm setback, 12cm stem (none integrated), 440mm  bar.
Senicx PR3 Gravel Bike Crankset 40T chainring 175mm Crank 10/11S Speed 24MM
Senicx T47-85.5-24R-Ceramic botom bracket
Wheeltop EDS GEX groupset
YBN 12 speed chain
Elitewheels Gravel wheels
Shimano RT86 160mm am 180mm rotors
ZTTO HG 12s 11-50 ULT SR cassette
Maxis Rambler 45C tires

Internal frame housing damper
Bartape
Carbon paste
Extra spacers for stem.
Cables and cable hosing
Grease
Tubeless valves and sealant
Pedals
Saddle

I would like to have mudguards but unsure what to get. If anyone have a advice or se anything wrong missing in the build, then please let me know

I'm same height as you are and I've recently ordered an XL as well. It looks like you are going to end up with a pretty long position. For a reference, I'm currently riding a lightcarbon gravel frame that is 2cm shorter than this one and I'm running 110mm cockpit and 15mm offset seatpost. For this build i've opted for a 100x420 cockpit and i've ordered both 0 and a 20mm offset seatposts just in case.

I'm not giving you a fit advice of course, just be sure to double check the geo since the frame is really long.

June 06, 2025, 05:26:18 AM
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Re: Velobuild AERO GRAV Frame
Thanks, this is good input! Im totally clueless when it come to road/gravle bikes, so I maximized size thinking i could always replace the stem etc later on. Since I have to learn this new type of bike i guess that making too eratic changes in start wont make huge impact (except avoiding soar hands and back for too long reach). I will follow your example here :)
I would definitely get an additional 0mm offset seatpost if I were you, it's only 35$. Even with separate bar and stem you still route the brake hoses through the stem internally so swapping up the stem is a pain in the butt. You will have to detach the brakes, remove handlebar tape, then reconnect everything and hope you don't have to bleed the system again. Also those spacers might not work with a regular aftermarket stem so you might have to source another stem from VB if necessary. Swapping the seatpost on the other hand takes 5 minutes if you need to shorten your position

June 06, 2025, 07:20:43 AM
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Re: Velobuild AERO GRAV Frame Hi,
from what I understand…and cycling industry loves to just throw in new standards…
T47 inboard measures 86,5…now, surprise, if you ever had to install a t47 86,5…you might have scratched either your
head or your frame, because the flange where you engage your tool is very thin.
So…they came up with a bb-shell width of 85,5mm…so a dedicated bottom bracket t47 85,5 has a wider flange for tool engagement!
That means you end up finally at the same total width.
Now…of course you can thread in a 85,5mm bb into your 86,5mm frame….but…you will end up 1mm wider!
So…whatever crank you are going to install….it could work…but you should consider it.
I hope I am right and it makes sense…

June 12, 2025, 08:49:03 AM
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Re: Velobuild AERO GRAV Frame
Hi, I didn’t some research into my crank and bb purchases. I got verified from velobuild that 86.5 is the outer measure of the threads on the frame.

The BB I bought was Senicx T47-85.5-24R-Ceramic Bearing,  that I measured to 85.5 maximum compressed. The middle "pipe" on the BB is there to keep dirt away from the bearings and avoid that the crank rubs against the inner cables, and I’m fairly sure it will keep tight.  It would be better with a wider BB.

The crank I bought was SENICX PR3 Gravel Bike Crankset 40T chainring 175mm Crank 10/11S Speed 24MM and this seems to be my main issue. It has an optimal inner distance of 89mm without spacers, so I will have about around 3mm of the splines not connected to the crank arm. The total length of the splines is 20mm. If need for spacers I think i will have a big problem.

When I said 24mm shims I was talking about the .1mm shims, I've bought some from aliexpress. You would need somewhere between 0 to .5mm of shims to prevent rub on the driveside. Id have no concerns about spline engagement at that point. I would use loctite on these cranksets in any case for the preload bolt

June 19, 2025, 08:52:32 AM
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Re: Velobuild AERO GRAV Frame I’m in the middle of the build, and so far I haven’t run into any problems.
July 11, 2025, 03:59:08 PM
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