They replied with this (my measurements on the right, theirs on the left): I contacted Trifox support again and explained all of the above, I asked how Trace Velo (who they sponsored to promote this frame) managed to get 285 mm of seatpost extension and sent them the above photo. I’m 99% sure he is actually just clamping the seatpost way below the minimum insertion. But, the seatpost I have, only has 240 mm maximum extension? So, Trace Velo either has a longer seatpost, or, he has his seatpost set up 45 mm BEYOND the minimum insertion line (measured from two different videos): Using that measurement, and a photo of his bike setup, you can measure his seat post extension at 280-285 mm in the below photo. Then I realised that the Trace Velo guy looks quite tall – So I went to his build video and he says he ordered the size 58, which has 522 mm seat tube length (C-T). These are some of the pictures I made for them to explain the issue: I sent them dozens of photos and tried to explain the issue several times over the course of a week. To be honest, I don’t see how anyone my height or taller could possibly fit on this frame, or the size 56 or 58, with the tiny seatpost. I asked several times if there was a longer seatpost for larger sizes, they said no. I tried to explain all this to the Trifox support guy, but they don’t seem to understand my issue (or don’t want to).

The frame is the right size for me in reach/stack/etc., the seat post is just extremely short. You might think I just need the next size up, but the size 56 only has 20 mm more seat tube length, and 20 mm more still isn’t enough, and the 56 has too much reach for me anyway (I’d need a tiny stem). The seat tube on the Trifox is actually 5 mm taller than the TCR, but the distance from saddle rail to min-insert line on the Trifox seatpost is just 240 mm, 60 mm shorter than the TCR seatpost! Basically, I need the seatpost to be at least 30 mm longer (40 mm really, to be safe with different saddles and pedals). On the Trifox X16, the maximum distance from the BB to the saddle rail is just 720 mm, so the saddle at maximum height is 30 mm too low for me. The maximum distance from BB to saddle rail on my TCR is about 780 mm, and I have it around 745 mm (depends on saddle and pedal stack, obviously). It was only after assembling the bike that I realized that there was a major issue: I have normal length legs for my height (inseam 83 cm), and on my TCR, the seatpost is about 20 mm from maximum height/minimum insertion. The geometry chart is only 1-2 mm different at most, basically identical. I compared the geometry to their geo chart, and bought a Trifox X16 size 54. I’m 178 cm tall and I ride a Medium Giant TCR Advanced (2016). Visit the shop at any time and place an order with a few clicks.I bought this frame after seeing Trace Velo, Hambini and Oz Cycle give great reviews for Trifox frames. Shop on for a bicycle frame that suits your needs. You need to be secure and comfortable when cycling by getting a wholesale trifox. You can either join the tubes using lungs, braze using silver, or the same material used in making the tube. This refers to the process of joining the frame tubes. Butting can either be internal, external, double, or triple. This refers to putting enough material at the point of the frame that undergoes a lot of pressure.

Butting is also another important factor. You can either choose a relaxed or aggressive geometry depending on how much time you spend cycling.

The geometry of the frame is also another important consideration. The strength of the frame material matters since it determines how long the bicycle will serve you. Although aluminum frames don't corrode quickly, they are highly susceptible to damage in the event of a collision.īefore buying a trifox, there are several factors you need to look at, including strength, geometry, butting, and welding. It is sturdy, and it can make frames that can accommodate riders of all sizes. Aluminum is also another material used to make a bicycle frame. This material is long-lasting, but it is prone to rust. It makes light frames that are suitable for cycling. Steel is also used in making a bicycle frame. Some manufacturers use titanium as a shock absorber since it flexes effectively but still maintains its structure. Titanium is a strong but light material, ideal for making the frames of mountain bikes. A trifox is made from different materials, including titanium, steel, and aluminum.