My present road bike is a 56 cm BMC Roadmachine 01 (stack 586, reach 390, TTeff 556, stem 110 mm)
My present gravel bike is a 56 cm Specialized Diverge Comp Carbon 2X GRX (stack 610, reach 392, TTeff 573, stem 90 mm). Both bikes have 172.5 mm cranks and 42 cm handle bars (flared on the Diverge). The top of my saddle is 78 cm from the middle of the crank along the seat tube. Both bikes have set back seat posts.
Note that Specialize measures the stack to the bottom of the stem, not the top of the head tube- the actual stack is probably 555. But I have the stem turned up and the bike uses a hover bar which raises the overall stack a bit more.
Both bikes fit me really well. However, I find that on long gravel rides over about 40-50 miles, my back starts to tighten up on the Diverge. I think it is because I do not get out of the saddle on gravel and I could use a little more stack (I am old and losing flexibility). I also find that at times I wouldn’t mind a bit more tire and on rough trails I have experienced occasional pedal and crank strikes due to the low BB on the Diverge.
I am looking at the Lauf Seigla and Otso Waheela C as replacements for the Diverge. I was able to briefly ride both a medium and large Seigla. The medium (stack 564, reach 394, and TTeff 563) felt great size wise, but the ride was short and I’m concerned with the lower stack that on long rides I will have the same issue with my back tightening up. Unfortunately, on the large (stack 593, reach 405, TTeff 584) I felt stretched out. The medium Seigla is spec’d with 172.5 cranks and 42 cm handlebars (which is what I normally ride), while the large is 175 and 44 cm.
I will not be able to test ride the Waheela C, hence this post. The reach on the large Waheela is only 3 mm longer than the Diverge, while the TTeff is 1 cm longer. I’m thinking the Waheela would be a better overall fit compared to either Lauf. I would be able to get a higher stack which would help on longer gravel rides and have the ability to run wider tires when I am going to be on rough trail.
If I go for the Waheela, should I use a zero offset seat post, or would I stick with the offset post? How would a zero offset affect overall ride feel?
Looking to see if others confirm what I am thinking, because Otso doesn’t have the best return policy and I don’t want to be hit with some crazy “restocking” fee.
I can also mention that I recently rode a 56 cm Salsa Cutthroat- stack 619, reach 385, TTeff 56- and I felt really cramped on the bike. It was spec’d with an 8 cm stem. I was also not thrilled with the PF bottom bracket.
Any input would be appreciated.
I tried to insert a image capture from Geometry Geeks, but I am not sure if it worked.