Ironman Copenhagen Bike Course Question

Hello,

I’m planning to do Ironman Copenhagen bike course with 1x12 sram groupset.
50t in the front.
10-26 in the back.

But I think I should go to 10-28 or maybe 10-33 in the back.

Does anyone has experience with the “hills” in the IM Copenhagen bike course?

I ride around 38 km/h on the flat on average. But I don’t know if the hills are steep in the Copenhagen bike course.

Anyone has a detailed steep% map or something where I can estimate my gear ratios?

I hope it is a bit clear what I’m looking for. :slight_smile:

The longest climb is 500 meter at 4,3 %. Might be some shorter ones that are slightly higher percentage. I used the smaller chainring on that one but you can probably just power up as you go faster than me

Geels bakke is the name of it, passed twice. Lots of ups and downs on the in land bit but it is not steep ups and downs. Denmark is relatively flat

I don’t think anyone can advise on gearing without knowledge of your pacing strategy and intended w/kg. In general the course looks ridiculously flat and a short Google search will yield plenty of gpx files for you to explore.

In general when in doubt go for the bigger cassette. Having to push into threshold territory a dozen times is probably more costly than the weight penalty and bigger steps between gears.

The longest climb is 500 meter at 4,3 %. Might be some shorter ones that are slightly higher percentage. I used the smaller chainring on that one but you can probably just power up as you go faster than me

Geels bakke is the name of it, passed twice. Lots of ups and downs on the in land bit but it is not steep ups and downs. Denmark is relatively flat

Thx for the info mate.

I don’t think anyone can advise on gearing without knowledge of your pacing strategy and intended w/kg. In general the course looks ridiculously flat and a short Google search will yield plenty of gpx files for you to explore.

In general when in doubt go for the bigger cassette. Having to push into threshold territory a dozen times is probably more costly than the weight penalty and bigger steps between gears.

I understand your reply. But I can’t see how steep the hills are on a GPX course… I’m not that good with these things. Can you see a hill % on garmin.connect ?

I did found the segment Geels Bakke like “lassekk” said. https://www.strava.com/segments/738309

I did IM Copenhagen in 2018. I don’t have info on grades/steepness but there is nothing steep or difficult. The highest peak was under 200 feet. I may have gotten into the small chain ring on the small hill but can’t really remember. It’s not a flat course but it’s a fast course. The biggest challenge was the wind. I thought it was a great course overall. I wouldn’t call it hilly. But I’ve done Whistler and Lake Placid which have had some significant climbs/mountains to ride up.

ETA: just found the elevation gain from when I raced it. 2802 feet of elevation gain for 111 miles. (LP and Whistler were around 6500-8000 feet)

Yeah, the total elevation gain I did found. But that is not so interesting because of not knowing the steepness of the hills. But if 5% is the maximum, I know what to test with my setup. And I think that would not be a problem with 50-26.