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Re: Velobuild VB-R-218
Quote from: hurburt on January 25, 2023, 04:47:03 AM
Heyo guys,
long time no see.

I have been riding my vb-218 since last september pretty much exclusively.
I just got home from a ride yesterday and today I wanted to hop on and take it for a spin, but I observed the following: see the pic.

there is a small crack in the carbon near the lower seatpost screw. I have not changed my saddleheight in quite a while and tightened it with 3-4nm only. So im guessing the frame is gone then?

I rode in around 0 degrees c in winter and my bike made some weird noises in those very cold temps. But i thaught that was the saddle rails or something like that.

How did you repair yours sebastian? And would you mind giving me a crashcourse in your trades :D? Also you think this is a warranty claim worthy case?

I was wondering if that is just a crack in the clear coat? if all warranty options etc fail you may as well sand that little area and see if the carbon is compromised. If it isn't just cover the sanded area in nail varnish to seal.
January 25, 2023, 06:47:27 AM 		1
Re: Velobuild VB-R-218
Quote from: hurburt on January 25, 2023, 04:47:03 AM
Heyo guys,
long time no see.

I have been riding my vb-218 since last september pretty much exclusively.
I just got home from a ride yesterday and today I wanted to hop on and take it for a spin, but I observed the following: see the pic.

there is a small crack in the carbon near the lower seatpost screw. I have not changed my saddleheight in quite a while and tightened it with 3-4nm only. So im guessing the frame is gone then?

I rode in around 0 degrees c in winter and my bike made some weird noises in those very cold temps. But i thaught that was the saddle rails or something like that.

How did you repair yours sebastian? And would you mind giving me a crashcourse in your trades :D? Also you think this is a warranty claim worthy case?

Un-Tighten an Re-Tighten the seat clamp screws slowly and see if you can make out any movement in the crack.
It's a bit of a weird spot because it appears to be below where the seatpost wedge actually expands. Also, examine the inside for cracks.

If you're sure that it's actually a structural crack, definitely make a warranty claim with VB.
Mine was replaced under warranty. Chris asked me to sand away the paint to expose the crack. But that shouldn't be necessary with yours.

January 25, 2023, 07:57:47 AM 		1
Re: Velobuild VB-R-218 Once again it’s good to see that VB at least stand behind their warranty.
But I must say, all the issues in this thread do not fill me with confidence. Not sure I would buy from VB again, to be honest.
January 30, 2023, 12:22:00 AM 		1
KABON Folding Bike - Roadie Build For the lack of folding bicycle category, I have decided to post here since the build is steered towards road bike build.

I bought a Kabon T800 carbon fiber folding bicycle for commuter recently to replace my existing BXT Carbon folding commuter. However, my evil mind decided to build an aero folding bicycle that not only can commute but go fast. When I looked around home for existing components, an Ultegra R8100 crankset with Stages G3 left crank vs Xcadey DUB carbon crank, BBs, spare Sensah Empire Pro (12s) and Sunshne SL 12T-32T, carbon road handlebar are available. So it was quickly decided to put a roadster together.

So here are intial pictures of the first build based on what I have being put together. Originally I had installed the Xcadey powermeter but the BB bearing was atrociously unsmooth so I changed it out. Parts and all are entirely from Aliexpress which includes brakes, rotors, cables and housing, steering saddle. The bike came originally with an ally aero seatpost that weighed at a whopping 544 grams. So I had it replaced with the carbon version at a diet weight of 385 grams.

Current build is 8.85 kg with stock Aliexpress carbon 451 wheelset and IRC Jetty Plus 20x1-1/8" tires. I have purchased a carbon steerer column which came with M23 locknut otherwise it would have reduced the weight to 8.55 kg. It is not compatible with the fork nut size with is a M20 so a replacement has been ordered which is en-route. Will update again once all the modifications are complete.

Here are initial pictures:
April 20, 2025, 05:14:39 AM 		1
Re: Velobuild AERO GRAV Frame
Quote from: hurburt on November 13, 2025, 03:25:59 PM
Hi guys, looking at the frame right know.

Can you let me know the max tire width possible for a 2x setup and the max tire width possible for a 1x setup?

thanks :)

Probably already has been answered in previous posts. I run 2x and plenty of room with Thundero 48mm.
November 13, 2025, 08:54:08 PM 		1
Re: Velobuild AERO GRAV Frame
Quote from: hurburt on November 13, 2025, 03:25:59 PM
Hi guys, looking at the frame right know.

Can you let me know the max tire width possible for a 2x setup and the max tire width possible for a 1x setup?

thanks :)

For a 1x setup, there's room for most 29x2.1 tires, which are about 50/51mm but with more volume.
I used Rocket Ron and Thunder Burt. I also tried Sworks Renegade 29x2.1, but they didn't fit (they're about 5mm taller than Schwalbe).
November 14, 2025, 03:22:14 AM 		1