My CFR-505 is my go-to bike if I ride more than 300km, not because it is more comfortable than my Canyon Ultimate CF-SLX, but because it has all the screws for bags 
I don't know the GR029, but comfort comes from a relatively flexible seatpost(27.2mm) and low pressure tires(eg: 2.5 or 3bars for 40mm tires).
The frame has little to do with comfort. The two triangles of a frame are stiff enough for most of us.

Geometry plays a role too if the rider is not very flexible anymore.
Maybe a shorter stem and spacers, or horror... a reversed stem  may bring the handlebar where it should be for your friend on a 707 ?

As far as I know, frames do flex vertically to reduce or absorbs vibrations. That’s why a good carbon frame manufacturer pay attention to the layers of carbons. Some thinner, while thicker on other parts. What they avoid is the lateral flex; they want it stiff in that directions to avoid energy loss when pedaling.

Ie. Fork needs some compliance, I have an old rigid MTB fork with same diameter top to bottom. Not sure if it’s butted or not, and it’s so stiff it vibrates alot to my neck on bad roads. Change it to another, boy it feels much better. It get it’s job better smoothening bad roads. But fork need to be stiff so it can reject the lateral force when standing. Disc rub when off saddle is the sign of bad flex.

On the topic of Velobuild, their 177 frame is their climbing frame, although I didn't check their geometry against your requirements.

177 is a nice looking frame. Although it needs cable management or atleast a water outlet in BB area. But as you said, it’s a climbing frame which I’m not looking into… yet. 

Ok for geometry wise and tire clearance I’ve narrowed it to 2 choices:
1. Tantan GR029 or GR039
2. Carbonda CFR505

Anyone have experience with those 2? Which one has more compliance, and better for long distance comfort?

So, did you get any reply from them?

Anyone able to contact miracle bike? I didnt get any reply from them

Hi guys,

Would also like some recommendations on frames if possible? OP, hope this is okay!!

I average around 800km's per month with most rides being between 1 hour to 2 hours (30km to 60km's), with a 3 hour+ ride thrown in when time permits. I'm based in Amsterdam so all of my rides are flat with little to no elevation change and are done solo.

I don't race and my only real goal is to try and increase my avg. speed from around 31km/h to 35km/h. so I can go further in my 1 to 2 hour riding window.

I'm 170cm tall, weigh about 67kg and ride a Triban RC 520 in size Small https://www.decathlon.com/collections/road-bikes/products/road-bike-disc-105-rc-520?

So far I've upgraded the wheels to some 50mm Farsports carbon rims and changed the seat post for a 0mm offset carbon version with carbon seat. This has reduced the weight from around 10.5kg's to 9.1kg's, and I'll be transfering as many parts as possible from my current bike to the new frame.

I'm curently looking at a few frames from VeloBuild (VB-R-099, VB-R-168 and VB-R-177) as they seem to have a good reputation for build quality, customer service and price point and it would be great to get some thoughts on which frame and size may suit me best, or if there are any alternative recommendations.

A geo comparisson of these frames vs what I currently have is here: https://geometrygeeks.bike/compare/triban-rc520-2019-s,velobuild-2020-vb-r-099-2020-49,velobuild-2020-vb-r-099-2020-52,velobuild-vb-r-168-2021-49,velobuild-vb-r-168-2021-52,velobuild-vb-r-177-2021-xs,velobuild-vb-r-177-2021-s

Looking at the numbers, the VB-R-099 in 49cm size seems to be a best match with a slightly lower stack (expected as it's aero vs endurance geo), and shorter reach. The shorter reach of the VB-R-099 is offset by the fact the shortest stem option that comes with the frame is 90mm vs my current 80mm stem. The proprietary bars seem to have a forward sweep that further increases the reach, and the proprietary seatpost also has a 20mm offset.

My ideal choice would be the VB-R-168 but would like to be able to run a standard bar, stem and seat post which would help with bike fit and replacement parts if needed, however this doesn't seem to be an option.

Anyway, very long post but would be great to get thoughts

Sure, go ahead. The most aero with fully integrated cockpit would be the best if I may add. Or maybe a TT frame. But As far as I know, no open mould frame have been build on a wind tunnel. Winspace said it was tested on one, but still need more reviews from real user.

Farsports, yoeleo, ican, light carbon are all good choices for wheels.

As for frames, people have had issues about dishonesty with tantan in the past through their aliexpress store but youre probably fine if you go on their website. Workswell, for disc brakes, people have also had poor disc lineup but those that have bought from them seem to really like the frame if everythings fine. Carbondas a good choice too.


Speaking quality assurance and customer support, didnt look at geo.

I guess people can have good and bad experiences. Workswell seems have slightly more prices. Or rather, I heard all chinese manufacturer are raising their prices lately?

I have a Carbonda 696,perfect frame. Light bicycle wheels, good too. 1056 Carbonda on order and farsports wheelset too. Service and contact were great so far.
Carbonda sells a matching handlebar for 1056.

1056’s geometry is more to my preference. (Shorter reach) will look into those you mentioned later, thanks.

Workswell seems to have long delivery times at the moment.

Maybe all global shipments are affected. I purchased a seatpost and took more than a month to arrive, which usually only took about 2 weeks.

Also check out the Carbonda 1056. It has an endurance fit (high stack, short reach), with a more road-like feel (short wheelbase, steeper angles), and it's pretty light weight.

Personally, I recommend against aero seat posts. They don't offer that much of a benefit, they are very uncomfortable, and they are proprietary. What if you want a seat post with a different setback? What if you don't like the clamp design (I hate the two-bolt design most manufacturers use)? What if you got a fancy carbon saddle but the clamp doesn't support oval rails? Too bad, you're stuck with it if it's proprietary and not a standard round shape.

Ah, I forgot the 1056. Was looking at it a moment ago and wondering if I’ve put it here. Thanks for the reminder. You maybe right about the seatpost. As I read somewhere, the differences is about 30+ watts between climbing and aero frame. And seat posts are just one of many factors. At first I inclined towards round standard seat post because of many slipping problems, and also the compatibility you’ve mentioned.

So Iguess I could narrow it down to which has more suitable geometry and lightweight. But a thin fork, head tube and low seat stays would help.   .

That means 4 choices left:
Tantan x21 for aero, lacking reach, slightly heavier
Tantan gr039 no aero seatube, perfect reach, ok weight for gravel frame
Carbonda cfr505 no aero seatube, ok reach, on the heavy side
Carbonda cfr1056 no aero seat tube, reach helped by stack, decent weight
Velobuild vbr99 laero, decent reach for me, decent weight
Workswell wcb r256 no aero seatube, reach is ok, weight also ok
Workswell wcb r357 no aero seatube, ok reach, no weight info.