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

[Eddy_Twerckx]

Anybody have experience with the JH-10 aero frame? Thinking about building up a stiff aero bike for crits.

[coffeebreak]

Man, TFSA always has unique colors. Their old frames also had great colorways.

[dsveddy]

The JH-10 looks absolutely sick, and advertised 950g is incredibly light for a frameset, and like others have said, it looks fast in all the right places--deep tubes, fairly narrow headset clean lines, shields the water bottles.

BUT as Patty and others have pointed out, the geometry is not great. 72.3 degree seat tube but no zero-setback option for the seat post? Not great. Narrowest bar is 380mm with a max stem length of 90mm? Not great. The 582mm stack for a 56 is wild to me--my Seka which is supposedly "endurance" geometry has a 571mm stack. I support it--it supports very new school "tall and long" bike fits that I like. But damn it's tall bike.

[Eddy_Twerckx]

The JH-10 looks absolutely sick, and advertised 950g is incredibly light for a frameset, and like others have said, it looks fast in all the right places--deep tubes, fairly narrow headset clean lines, shields the water bottles.

BUT as Patty and others have pointed out, the geometry is not great. 72.3 degree seat tube but no zero-setback option for the seat post? Not great. Narrowest bar is 380mm with a max stem length of 90mm? Not great. The 582mm stack for a 56 is wild to me--my Seka which is supposedly "endurance" geometry has a 571mm stack. I support it--it supports very new school "tall and long" bike fits that I like. But damn it's tall bike.

Yea I think the sizing is like one size off. Their 56 is almost a 58 from other places. Look at the top tube length, 575. That’s almost the same as my 58 Tarmac SL7 at 577. If you go one size down than normal, it’s not too bad, albeit short reach. I’m normally a 58 but would definitely do a 56 here.


The other frame I was looking at is the BXT aero frame, the one that looks like the previous model Madone.

[jonathanf2]

Yea I think the sizing is like one size off. Their 56 is almost a 58 from other places. Look at the top tube length, 575. That’s almost the same as my 58 Tarmac SL7 at 577. If you go one size down than normal, it’s not too bad, albeit short reach. I’m normally a 58 but would definitely do a 56 here.


The other frame I was looking at is the BXT aero frame, the one that looks like the previous model Madone.

Yeah I just cross referenced their geometry chart with my current aero'ish frame and it would put me on their 47cm frame. I'm not that tall, but I didn't consider myself that short either!

[coffeebreak]

They had the perfect opportunity of labeling their sizes as per the ETT length but they didn't. Like All-City where they label their frame as size 52 and then put a sticker on top tube "length 540mm".

[BalticSea]

The JH-10 looks absolutely sick, and advertised 950g is incredibly light for a frameset, and like others have said, it looks fast in all the right places--deep tubes, fairly narrow headset clean lines, shields the water bottles.

BUT as Patty and others have pointed out, the geometry is not great. 72.3 degree seat tube but no zero-setback option for the seat post? Not great. Narrowest bar is 380mm with a max stem length of 90mm? Not great. The 582mm stack for a 56 is wild to me--my Seka which is supposedly "endurance" geometry has a 571mm stack. I support it--it supports very new school "tall and long" bike fits that I like. But damn it's tall bike.

Seka Exceed isn't endurance geometry, it's just not a stupid long and low geometry, which suits only a small minority of riders. Also, sizes have always been inconsistent across different brands, there's no universal size M or size 54, that's why you should always go by geometry chart rather than listed frame size.

Size 52 JH-10 has 540mm stack, 385mm reach and 550mm top tube, which is quite in line with other aero bikes in most common size (M/54).

I.e. size M 2023 Giant Propel - 388mm reach, 545mm stack, 550mm effective top tube, 73° seat angle

Size 54 Trek Madone gen 7 - 386mm reach, 541mm stack, 543mm effective top tube, 73.7° seat angle.

Size 54 Teammachine R - 387mm reach, 548mm stack, 552mm effective top tube, 73.5° seat angle.

Size 54 Scott Foil RC - 389mm reach, 548mm stack, 550mm effevtive top tube, 73.6° seat angle.