Frame geometry - what do people think?

Any opinions on the geometry of this frame design?
(I know triple triangle frames aren't to everyone's taste)

What exactly are you asking? I mean what kind of feedback you want?

Very long reach and short headtube, how tall are you and what do you usually ride?

I'm 6ft 2 and I'm basing the geo on a pursuit-style frame.

(Thanks for posting the image)

Not sure on the angles but the tube measurements are similar to my Orlobropro...

I think the only thing you really need to think about is just the headtube length, if it's a little short you'll end up having a couple of spacer which is a little bit of a deal breaker if you were to go custom.

Not sure on the angles but the tube measurements are similar to my Orlobropro...

Thanks for the picture, it's good to see a similar frame in terms of measurements in the flesh (or pixels).

I think the only thing you really need to think about is just the headtube length, if it's a little short you'll end up having a couple of spacer which is a little bit of a deal breaker if you were to go custom.

Hm, so maybe a rethink of the headtube length is in order, thanks for the advice.

One more thing is that with that seat angle, a layback post may be necessary if you intend to ride it a lots more than you'd think, but if you wanted a in-line post like says a Thomson, getting the seat angle around 73, 74 degrees max would help keep it looking good with in-line and saddle rail claim almost in middle*.

*modern saddle, old saddle rail is usually short and further back.

ah yes, this is a good point - I definitely think I will get closer to 73 degrees you're right. yes, I definitely would want an in-line post too.

FWIW, my old CX bicycle have a 74 degree ST, and I was able to get away with an in-line seatpost and modern saddle, making it slacker would mean you need to increase your chainstay length to stop the tyres from rubbing on the seat tube when at the bottom of the track end.

Yeah, maybe 74 degrees would be enough. Ah yes, so if I went for 73.5 degree seat tube I'd extend the chainstay length by 10mm (or would it need to be more?).

And increase the wheelbase making it less of a pursuit geo, so 74 is a decent angle to go for without too much compromise.

If i were to guess a half degree change in seat tube angle would be less than 3mm difference at the point where the wheel would rub the seattube. But thats me shooting wild!

short headtube

O rly? My T3 has a 90mm head tube, and that's integrated so no headset stack height to be added. To get the same stack, assuming a conventional headset and allowing for the different BB drop, the OP would need an 80mm head tube, i.e. exactly what my Fort, with it's conventional headset, has.

Nonetheless, subscribing to thread to watch the blind leading the blind.

Hah, the BB drop of 45mm would make the headtube length quite small.

Dredge but I cant think of anywhere else to ask..

Does the geo on this frame look off? im no expert but do you think the fork is too straight? Looks like it need a bit of rake to bring it together a bit

Both the seat- and headtube seem very slack. Maybe the frame wasn't designed for a 700c front wheel?

Edit: 650c wheel might look like this:

Angles don't seem to be over 70 degrees in the original picture. Bottom bracket also seems quite high.

It looks strange because ST/HT angles are sitting below 70. Looks to me like that should have a 650c front.. almost even 24" but that could bring the bottom bracket too low.

edit: ^^

With the 650 front it looks slightly more normal. Tempted to ask if its still for sale and make an offer but getting a new fork made seems long right now. Thanks for the help people :-)

Get it get it.

Makes up for that other blue lopro u lost out on by 1p.

Can swear there were some 650c fork for sale on here, may be sold by now.

Ive sent the seller loads of questions but im not sure if its gonna be worth the price and hassle to get a fork made up etc. I bet its gonna be french threaded and mad sizes all round too

Bringing this over from which CX bike thread. Trying to decide with my other half on which of these two CX bikes would be the best for some off roading on trails as well as some bike packing tours with the options of rear pannier longer touring.
Either the Focus Mares AX 1.0 2016 or the Giant TCX 2014

Both similar geos but with a bit more on the HT angle on the TCX. She's worked out the stack and reach to be the same on both bikes.
I think the TCX is more aggressive because of the extra 1.5º on the HT angle, but she thinks this is negated because the reach is the same and the HT length on the TCX is longer. I still maintain that even though the reach is the same, she'll still be in a slightly more aggressive riding position.

So the question is, is the Giant TCX more aggressive and will it make much difference over longer distances. If so, can this be alleviated with a shorter, higher stem?

tldr: Which of these is more comfortable.
Cheers.

They have about the same reach so the different headtube angle results in:
giant 70mm trail vs felt 80mm trail with 35mm tyre

so in same riding position setup the Giant is quicker steering = better in my book.