GaryvdM

Interesting video on the biomechanical effects of shorter cranks:

No. It is affected. Lets do the math, and test it: The actual MA should be calculated with the radius to the outside of the tire, but I can't attach my scale to that, so just using to the end of the spoke where I can attach it. I measured 2.65kg when I tested (not using the most accurate of scales.) Now lets shorten the crank: I measured 1.65kg when I tested.

You are right that changing the crank length changes to overall gearing. But the idea is when you put a shorter crank on you put bigger chain-rings on so you keep your overall gearing the same. The benefit from the shorter crank comes from smaller hip angles, not the change in gearing.

I think they are great for road bikes. But for anything with a clutch derailleur they are a bad idea: The constant lengthening and shortening of the chain results in power lost to the friction in the clutch, and causes the clutch to wear faster.

I see that Mount Grace climb has a peek gradient of 9.1%

Well run event! With only 4 months training, it was a suffer fest for me. Very glad I took the full sus MTB! I was watching guys with Gravel bikes with narrower tires, and it looked very uncomfortable.

Wish I could go that wide on my gravel bike. The widest I can do is 45 front 50 rear.

Lekker bike. How wide are your tires?

The route changed slightly (5km longer). I've updated the above, so you'll want to re-download if you have already downloaded.

For lower price range - I'm very happy with my Sigeyi AXO.

Hmm, I believe you are correct. 1.37 in

I believe that Alpina is an Italian make, so it's most likely the old Italian standard: Inner diameter: 36mm Thread: 24tpi Width: 70mm Else it will be BSA standard: Inner diameter: 33.5mm Thread: 24tpi Width: 68mm Take the old BB out, measure the ID and width with vernier calipers.

10 Days to go. Plotted out the route: https://ridewithgps.com/routes/49577645 https://www.strava.com/routes/3319657390443857844 Still trying to decide on Gravel Bike vs Full-sus MTB... Comfort vs speed

I'm entered. Last year: https://www.facebook.com/media/set/?set=a.918443413617844&type=3

There are roads around the cradle with cuttings like that, e.g. here, but I can't find the exact location (I tried.)