Author Topic: Velobuild AERO GRAV Frame  (Read 522529 times)

Niculasch

Re: Velobuild AERO GRAV Frame
« Reply #555 on: March 17, 2026, 06:53:08 AM »
What width do the Continental Race King 2.0 measure when mounted on Elite rims with a 32 mm internal width?
And how much clearance is left between the tire and the frame, especially at the rear?

If possible, could you measure it and send some pictures?
I’m planning to run the Continental Race King 2.0 at the rear and the 2.1 at the front, but I want to make sure it won’t get clogged in muddy conditions.

internal width of my wheels are 24mm. I made a mistake on the model of elite wheels: mine is slr which, on 45mm, is 24mm inner width. clearance is 4mm on both side (tire nubs touch the frame).

Niculasch

Re: Velobuild AERO GRAV Frame
« Reply #556 on: March 17, 2026, 07:15:20 AM »
Hi guys,

I have finished my (first ever) built and ran into the same headset problem, its already more than tight and there is still play left. I dont fully get why and how you guys fixed it, so I would immensely appreciated your feedback. I also had to move the settings of the derallieur almost as much "inwards" as possible for the derallieur to sit over the cassette properly and was worried but shifting is smooth so I dont see any reason to change it.

Here is my built:
Grx Di2 827 (fully wireless) with 105 brakes and levers, enough for me and I much prefer the "slimmer" handles.
Elitewheels whatever :D
Velobuild Gravel handlebar
44t chainring, I will need bigger. Might even try a 9-45 cassette if 46 is the max chainring.

I would be very grateful for you input. Attached you see the expander, the cover and how the expander sits on top of the fork.
How on earth can I get rid of that headset play?
Shim? If yes, where is that supposed to go?
Shorten the fork another mm? -> From how it looks, that shouldnt make a difference. The cap sits correctly and I can properly "pull" the expander towards the top cap.

It feels more like there is "back and forth play" so when I pull the front break and push / pull the bike, the whole cockpit and spacer tower moves back and fort about 1-2mm.
Is that what you guys are describing?

Its driving me nuts and I am really at a loss at this point.


@Niculasch: LOVE your built, looks sick! Great colour, very nicely done.
Which handlebar have you got? It seems you can easily use a different expander, because the round top cap from the Deda fits?
I got the gravel handlebar from velobuild with the custom top cap, that wouldnt work / look stupid.
Also, is the chainline ok? The p515 is a narrower crankset than GRX / SRAM xplr, right? I initially wanted to built it with a p515 as well, have one in stock, but stepped away after reading about chainline.


@Motus: That looks like the same handlebar I got. Did you have play in the headset and how did you fix it?

If you read some of the posts above, you'll find my experience. Basically, my problem was with the included shim, which was too thin and didn't allow me to tighten the headset properly (the cover would hit first). I solved it with a 1mm shim (the only one I had on hand; I'm waiting for a thinner one so there's less space between the cover and the frame). Actually, the handlebar is the standard one that came with the frame (I’ve noticed that almost everyone has a different one, so I’m not sure). Yeah, you’re right on the crankset — the P515 has a narrower (road) chainline compared to GRX/XPLR. On paper it’s not ideal with wide cassettes, especially 10/51 or 11/51.
That said, I’ve seen quite a few builds mixing road cranks (Ultegra, etc.) with XT rear derailleurs — same concept. It’s a bit of a compromise, but it works fine in practice as long as you spend some time dialing in the setup.
« Last Edit: March 17, 2026, 07:29:36 AM by Niculasch »

numberzero

Re: Velobuild AERO GRAV Frame
« Reply #557 on: March 17, 2026, 09:30:20 AM »
I rode an aerogravel for around 1600km chosen to replace my actual ican gra02. Geometry is identical at the exception of the chainstays 425 vs 430 and i used the same components to make a fair comparison.

On static it's a very well done frame, clean internals, quality anodized aluminium headset parts, handlebar is pretty good too, easy routing, i didn't like the tightening system where you need 2 keys. I didn't have any problems with the parts provided.
One color painting had correct/good quality but seems fragile, easy to scratch.

Firstly i rode the VB with the tufos 40 i'm used to.
The frame itself felt a little bit more lively/light under pedaling but global comfort/stiffness is equal, on the stiff/harsh side.
The velobuild fork is beefier and thus really rigid, it was clearly less comfortable than the ican's one.
I have to say i was a bit disapointed, the difference with a nearly 10 years old ican gra02 is marginal and riding on tiny tires is not the best once you leave soft gravel.

Then i briefly rode with mtb tires. The bike is much more capable, smoother at the price of less lively and responsive feeling.
But it's far away from the ability of a real mtb.

I ended on the 50 specialized tracer, which were a good mix between the comfort of mtb tires and the liveliness of gravel tires.

My conclusion is that the aerograv is a responsive bike, it can be fun, but definitely not a refined frame, comfort relies almost only on the wheels/tires choice and to me you need minimum 45mm tires.
As many mentions it lacks of compliance, sometimes hitting hard stuff at speed makes you worrying about losing some theeths, fork really shakes you...
Despite the low price, for these reasons, i didn't fall in love with the aerograv, i probably just recommend it if you like really stiff bikes or ride soft gravel terrains.

ricchirock

Re: Velobuild AERO GRAV Frame
« Reply #558 on: March 18, 2026, 03:52:21 AM »
I rode an aerogravel for around 1600km chosen to replace my actual ican gra02. Geometry is identical at the exception of the chainstays 425 vs 430 and i used the same components to make a fair comparison.

On static it's a very well done frame, clean internals, quality anodized aluminium headset parts, handlebar is pretty good too, easy routing, i didn't like the tightening system where you need 2 keys. I didn't have any problems with the parts provided.
One color painting had correct/good quality but seems fragile, easy to scratch.

Firstly i rode the VB with the tufos 40 i'm used to.
The frame itself felt a little bit more lively/light under pedaling but global comfort/stiffness is equal, on the stiff/harsh side.
The velobuild fork is beefier and thus really rigid, it was clearly less comfortable than the ican's one.
I have to say i was a bit disapointed, the difference with a nearly 10 years old ican gra02 is marginal and riding on tiny tires is not the best once you leave soft gravel.

Then i briefly rode with mtb tires. The bike is much more capable, smoother at the price of less lively and responsive feeling.
But it's far away from the ability of a real mtb.

I ended on the 50 specialized tracer, which were a good mix between the comfort of mtb tires and the liveliness of gravel tires.

My conclusion is that the aerograv is a responsive bike, it can be fun, but definitely not a refined frame, comfort relies almost only on the wheels/tires choice and to me you need minimum 45mm tires.
As many mentions it lacks of compliance, sometimes hitting hard stuff at speed makes you worrying about losing some theeths, fork really shakes you...
Despite the low price, for these reasons, i didn't fall in love with the aerograv, i probably just recommend it if you like really stiff bikes or ride soft gravel terrains.
I completely agree with your analysis. Being very stiff it requires a bit of time of adaptation to it especially on rough surfaces and ride confort always lacks. But after a few weeks of adaptations, on downhill light gravel roads (tuscan white roads for example) or even paved I found it great giving a lot of confidence, and it somehow surprised me. Definitely not an all round gravel frame, but good for a specific use.

BikerJens

Re: Velobuild AERO GRAV Frame
« Reply #559 on: March 18, 2026, 06:55:58 AM »
It's funny, cause I just reviewed mine as less stiff than I want it to be. But I also use it mostly as a hybrid between tarmac and light gravel.

What you guys are saying makes perfectly sense. I'm just not used to riding gravel bikes, but more Aero road bikes. Compared to my Merida Reacto I really think it lacks stiffness when trying to hit peak powers.

It might be me losing touch with the original intend of the frame.

https://www.instagram.com/dadvibescycling/reel/DVywHrACH62/

The positive news is that I've just ordered some gravel wheels and wider tires to try more gravel.
Tall person with gigantic CdA

CycOps

Re: Velobuild AERO GRAV Frame
« Reply #560 on: March 18, 2026, 08:18:54 AM »
Compared to my Merida Reacto I really think it lacks stiffness when trying to hit peak powers.
 

Saw the vid. What frame sizes you're sporting (Velobuild/Merida)? Just curious :-)
Less stiff, but you still recommend it as versatile allrounder, right?

BikerJens

Re: Velobuild AERO GRAV Frame
« Reply #561 on: March 18, 2026, 09:49:54 AM »
 

Saw the vid. What frame sizes you're sporting (Velobuild/Merida)? Just curious :-)
Less stiff, but you still recommend it as versatile allrounder, right?

XL both. Geometry is very similar on them :)

And yes. For the price point I think it’s a excellent choice for an all rounder. I’m using 35 mm tires and use it half on road, half on dirt.

And regarding the stiffness - I only really notice it when I’m trying for +1200W.
Tall person with gigantic CdA

jermu

Re: Velobuild AERO GRAV Frame
« Reply #562 on: March 18, 2026, 05:12:14 PM »
Pretty damn annoyed with the headset and cockpit. Cockpit required good bit of filing to get it flat, bottom was horribly uneven.

Second problem is with the metal U-ring being too thin, dust cap sits against the frame. It is fine with some shims but it does not look like an ideal solution because of the internal cable routing. I am kinda afraid that over time edge of the very thin shim will cut into the brake hoses.

Any ideas? I thought about cutting the shim just under size of the U shaped ring and gluing it to the dust cover.

CycOps

Re: Velobuild AERO GRAV Frame
« Reply #563 on: March 19, 2026, 03:43:21 AM »
Hi everyone, does anyone have any opinions on this BXT carbon frame https://it.aliexpress.com/item/1005009971889379.html?
Use search function here in the forums theres several threads about this frame or where this frame is discussed.

Luffabong

Re: Velobuild AERO GRAV Frame
« Reply #564 on: March 20, 2026, 02:49:02 PM »
Adding additional spacers will help you diagnose what's going on with your headset (without the hassle of having to cut the fork again).

Loose expander -> carefully observe position of expander, then tighten top cap (with the additional spacers installed). Then disassemble everything again to see whether the expander moved.
Steerer tube too long -> if the issue with the headset play doesn't return with the additional spacers installed (and you have ruled out the expander), you know your steerer tube needs shortening.
Bearing play -> unlikely, I suspect you'd be able to feel that just by handling the bearings.

And yes, the clamped stem is what's meant to keep the headset compressed; the top cap is only intended for the initial bearing pre-load.

Regarding your question about the shim, you'll need shims if your bearing cover bottoms out against the frame; you want the cover to float just above the headtube. The shim(s) would sit between the compression ring and the cover.


Thank you, this was very helpful!

I got a spacer at a nearby shop and used the cap which was thankfully also provided by velobuild.
I think it has fixed the problem for the most part for now.

Its not pretty, but not ugly enough for me to redo the bleeding of the breakes - classic case of "whatever, Il leave it like that for now".


I still dont fully get the shim thing but maybe thats a topic to look into some other time.

shy-b

Re: Velobuild AERO GRAV Frame
« Reply #565 on: March 20, 2026, 04:02:14 PM »
Has somebody tried the Continental Dubnital 2.2s in the front? Is it possible or too close?

Unknownftp

Re: Velobuild AERO GRAV Frame
« Reply #566 on: March 21, 2026, 04:47:10 PM »
Has somebody tried the Continental Dubnital 2.2s in the front? Is it possible or too close?

I did a raceking 2.2 in the front and was fine. Currently running a 2.25 Vittoria Barzo and its close but still no rubbing. Its measuring at 56mm

Hills

Re: Velobuild AERO GRAV Frame
« Reply #567 on: March 24, 2026, 01:54:08 AM »
Hello,

I’ve just placed an order for the gravel frame  ;D

I have a question regarding the rear caliper mount. I’m planning to run 160 mm rotors both front and rear. For the front, I assume I’ll use the 160/180 adapter bracket—but how does it work for the rear?
The groupset (Shimano R7170) didn’t include a rear caliper adapter. Can the caliper be mounted directly to the frame, or do I need to use an adapter such as SM-MA-R160D/D-B?

I’m trying to have everything ready before the frame arrives so I can get out on the gravel as soon as possible  ;)

Hills

Re: Velobuild AERO GRAV Frame
« Reply #568 on: March 24, 2026, 07:52:11 AM »
Hey! Nice choice with the R7170.

Most gravel frames are native 140mm at the rear, so if you want to run 160mm rotors you definitely need an adapter. Shimano doesn't include it in the box because it depends on the rotor size you choose.

The part you need is the adapter. You can find it here:
https://it.aliexpress.com/item/1005010129355876.html (Just make sure to select the Flat Mount R160 version from the options).

One thing to check: make sure the frame comes with the mounting bolts, otherwise you'll need to buy them separately based on the thickness of your chainstay.

Hope this helps!

Thanks for the reply! I’ll make sure to get one of those.

Now I’m just hoping the front derailleur will fit and won’t limit the tire clearance, but I guess I’ll find that out soon enough  :)

geramonta

Re: Velobuild AERO GRAV Frame
« Reply #569 on: March 24, 2026, 09:43:03 AM »
Thanks for the reply! I’ll make sure to get one of those.

Now I’m just hoping the front derailleur will fit and won’t limit the tire clearance, but I guess I’ll find that out soon enough  :)

For the rear, no adapter is required for a 160 mm disc, as this is the minimum size supported by the frame.
For the front, to use a 160 mm disc, a 140 mm adapter is used, since it is also designed to accommodate 160 mm.