I’m one of the lucky ones who were able to buy a new bike in 2022.
I bought a new 2022 Scott Spark Comp and replaced my 2019 Scott Scale 950 hardtail.
I upgraded the Spark with quite light carbon rims 30mm internal (1514g) and a light Garbaruk cassette. The race weight is now around 12 kg. The previous Scale was 11.5 kg (aluminium frame and aluminium rims 25mm internal).
As I really like the handling of the new bike and enjoy the comfort of a full suspension bike, I made some observations from my races this year which I can’t complain and hope someone can help me.
I compared the Strava segments of the races last year with this year. Especially the climbing segments (where I can exclude drag influences like cda or drafting effects) showed significanlty slower times by higher power outputs. All these segments show comparable slower times.
I use the same Sigey AXO spider PM which I used on my Scale.
Some segment comparisons:
The question is, what makes me slower? Why do I loose ~20W?
The parameters I’m currently looking at:
Tires on Scale: Maxxis Aspen 2.25 → Spark: Maxxis Recon Race 2.4
Bike weight Scale 11.5 kg → Spark: 12 kg
Tire pressure Scale ? (can’t remember) → Spark: 19/20psi
Rider weight 75 kg unchanged
Schwalbe Aerothan tubes in both years
1 bottle of mix on the bike on both bikes during the race
Surface conditions were very much the same in both years
I’m quite good at pacing the climbs in the race, so I don’t think that this is a huge influence
I fully locked my suspension on the Spark in all climbs.
As I’m having a new bike, I don’t assume that the bearings have an influence.
I trained much better this year and am convinced that I really put out the higher power which reflect my indoor training numbers. So I don’t think that the power difference is comming from a PM failure.
Regarding tire pressure I did a separate test yesterday on a gravel climb (surface comparable to race segments) ~5min @ 250 W evenly paced. I compared 24/25, 19/20 and 15/16psi. The results where within 3 s. So I couldn‘t see a significant influence of the tire pressure in terms of speed.
I don’t have other tires available at the moment. So I couldn’t test this yet. But it would surprise me if the Aspen 2.25 are that much faster than the Recon race 2.4 on a gravel climb!?
Any thought which make me faster again are welcome.