TFSA JH-15 and JH-10 - lightweight and aero disc frames

[jonathanf2]

JH-15 lightweight disc frame 800g:
https://www.aliexpress.us/item/3256806110245610.html



JH-10 aero disc frame 950g:
https://www.aliexpress.us/item/3256806110562913.html



TFSA has been rather quiet, but I just noticed they've released some new frames. I bought their older JH-06 disc frame (an SL6 clone) awhile back and had an overall good experience buying from them with solid communication, ample photos before shipping and secure packaging upon arrival. Only downsize is their shipping method is a bit slow (took over month to deliver). Also it appears they've raised prices as well.

[mirphak]

The JH-15 is really nice, except for that super low stack: 540 in size 54. That is just too damn aggressive for the average Fred (i.e. Me). My custom titanium has 60 mm taller stack than that

[jonathanf2]

The JH-15 is really nice, except for that super low stack: 540 in size 54. That is just too damn aggressive for the average Fred (i.e. Me). My custom titanium has 60 mm taller stack than that

I do a lot stretching and strength training (deadlifts, pull-ups, back rows) just to maintain a low riding posture. Also a back roller and massage gun help! 

[raisinberry777]

The JH-15 is really nice, except for that super low stack: 540 in size 54. That is just too damn aggressive for the average Fred (i.e. Me). My custom titanium has 60 mm taller stack than that

It's pretty normal for a race frame - I wouldn't call it super low. For example, a Specialized Tarmac is only 4mm higher for the same size, and a Canyon Ultimate is 1mm lower. A 600mm stack for a size 54 would be very tall, that's 25mm higher than a Trek Domane, which is one of the tallest endurance bikes.

[toxin]

JH-10 looks aerodynamically sound, though probably as comfortable as a brick. The way they use the seat angle to increase the size is very weird though

[mirphak]

It's pretty normal for a race frame - I wouldn't call it super low. For example, a Specialized Tarmac is only 4mm higher for the same size, and a Canyon Ultimate is 1mm lower. A 600mm stack for a size 54 would be very tall, that's 25mm higher than a Trek Domane, which is one of the tallest endurance bikes.

Don't listen to me, I am a weirdo. But will have, finally, no spacers in my next bike  .

Actually it is just 1cm taller than the Canyon endurance CF7 in size M, for a similar (4mm longer) reach and similar top tube (2mm shorter). So not that crazy tall.

[jonathanf2]

JH-10 looks aerodynamically sound, though probably as comfortable as a brick. The way they use the seat angle to increase the size is very weird though

I actually like how the JH-10 looks for an aero frame. Also that bottom bracket area looks fat, I bet you can really put down the power. Though I think I could see my self riding the JH-15. I like the high seat stays on that frame and the weight seems decent.

[patliean1]

Frame reach of 390mm with a stack height of 582mm for a size 56 JH-10 is considerably upright for being advertised as an aero frame.

[mirphak]

Frame reach of 390mm with a stack height of 582mm for a size 56 JH-10 is considerably upright for being advertised as an aero frame.

Don't look only at the reach. The top tube is really long because the seat tube angle is quite slack. Actually the geometry in that bike does not make much sense. I would have expected a much more vertical seat tube to move all the weight to the front and get a much more aero position and more efficient pedaling.

[Sebastian]

Stem length for their cockpit maxes out at 110mm.
It’s another one of these framesets that won’t work for people taller than the average bloke. I’m 190cm with long arms. I could maybe make a size 56 work. But I’d probably have to get a 130mm stem. That’s almost impossible to get as an integrated cockpit. Cool frames, though.

[TidyDinosaur]

Seller shipping method is Free, so if that is correct this could be a very cheap frame for EU. A little over 500usd.
But I highly doubt that is correct.

[TidyDinosaur]

There seem to be some more new frames from TFSA. I really like the looks of this one: https://www.aliexpress.com/item/1005006306017776.html

Edit: never mind, this seems to be the SL7 inspired frame that they already had for a long time. It looks like they did change the paint/logo's

[smu55]

JH 15: The shape of the front of the headtube looks completly round in the render images. The other shapes of the down and seat tubes dont look very aero to me eiter. I doubt they ever but this frame in an wind tunnel. What do you guys think?

[jonathanf2]

JH 15: The shape of the front of the headtube looks completly round in the render images. The other shapes of the down and seat tubes dont look very aero to me eiter. I doubt they ever but this frame in an wind tunnel. What do you guys think?

I think that frame takes quite a bit of "inspiration" from the Cervelo R5. If anything, Cervelo did the wind tunnel test for TFSA! 

My first carbon frame was from TFSA and I'm still riding that bike two years later with thousands of miles on the frame. Part of the reason I bought from them was due to excellent communication from purchase-to-shipping. I'd definitely consider buying another frame from them again. I'm actually surprised they're not as popular on this forum.

[Takiyaki]

I wish the light frame had a round seat post. Tired of proprietary seat posts