Road bike geometry

[LOOK695]

As I am researching frames for a future purchase, I have noticed that the geometries are mostly the same concerning seatpost and headtube angles, mostly based closely around 73 degrees. The more endurance based frames will generally have a longer headtube for a more upright setup and slacker steering for more stable frontend with slightly slower steering response. My gravel bike has a headtube of 72.5 degrees and I like it.

 

Now one of the frames I came across has completely different angles; the seat tube is 75 and headtube is 71. Strangely the reach is longer than other examples with a more traditional geometry. I would have thought that the reach should be shorter? And how would such a bike ride and handle?

Below a pic of geometry and frameset

 

 

 

[NotSoBigBen]

Not perhaps a TimeTrial bike frame?

[Captain Fastbastard Mayhem]

Remember reach is the measurement from BB to mid top of the head tube in a horizontal line. So if the seat tube is steeper, but the top tube is approximately the same length, then the BB will be further back. Imagine 2 rulers and you're slowly opening the angle (steeper seat tube angle) - the distance between the 2 ends gets longer the steeper the angle.

 

Should be more stable due to the head angle, offer you more space when out of the saddle and give you a position that is more over the top of the pedals. Sorta a hybrid or midway between road and TT. Maybe. Not too clued up on road bike seat angles. But a 75deg STA on an Mtb means it'll climb far better as you're more centrally positioned and over the pedals.

[LOOK695]

Remember reach is the measurement from BB to mid top of the head tube in a horizontal line. So if the seat tube is steeper, but the top tube is approximately the same length, then the BB will be further back. Imagine 2 rulers and you're slowly opening the angle (steeper seat tube angle) - the distance between the 2 ends gets longer the steeper the angle.

Should be more stable due to the head angle, offer you more space when out of the saddle and give you a position that is more over the top of the pedals. Sorta a hybrid or midway between road and TT. Maybe. Not too clued up on road bike seat angles. But a 75deg STA on an Mtb means it'll climb far better as you're more centrally positioned and over the pedals.

Would that then mean the saddle to bar will be shorter with the steeper seatube?

[LOOK695]

Not perhaps a TimeTrial bike frame?

No, listed as road frame

[Captain Fastbastard Mayhem]

Would that then mean the saddle to bar will be shorter with the steeper seatube?

Not if the top tube length is the same