u/dlb_7

Ultegra Di2 R8150 battery life

On my Giant TCR Advanced pro 0 it has Ultegra Di2 R8150 and I am concerned about the battery life.

I would say I have to charge it after 400/500km riding and everywhere online says I should be able to get 1000km+.

Is this a cause for concern? Can I do anything to check improve the situation? Does anyone else get similiar range?

I ride in the UK and find I shift often but not excessive amounts.

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u/dlb_7 — 5 days ago

TCR 2025 Race Tire size recommendations

I will be racing a 70.3 iron man on my TCR 2025 and am wanting to upgrade my stock tires (Cadex RC 28mm) for the race and general riding after.

I think I’m set on GP5000S TR as my tires but wondering what size to get. Seems the candidates are 28,30,32.

While I am not challenging for the podium I would appreciate some marginal gains from my tires so leaning towards 28-30 for aero gains but would like added comfort on UK roads so 30-32 win here.

Is 30mm the sweet spot between performance and comfort? Will they be a significant upgrade from the Cadex rc 25 or should I just use them until fully worn out?

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u/dlb_7 — 5 days ago

Rubbing sound when steering

Please see my video but this level of noise doesn’t seem normal to me. What do you think is causing it and can I fix it at home?

On my ride I also had so creaking in headset area and for context, I’ve recently had the bar dropped 1cm without any adjustment to the brake hoses so wondering if it could be that?

u/dlb_7 — 18 days ago

Ultegra CS-R8101 cassette rattle in 4th cog on 2025 TCR

Hi all,

I have been noticing a rattle on my TCR 2025 when the cassette is in the 4th cog. The cassette is a 11-34 Shimano Ultegra CS-R8101.

It has been like this since the start and I took it back to the shop so they could inspect and they couldn’t find anything obviously wrong.

Has anyone ever experienced this on their bike? Did you manage to ‘fix’ it?

u/dlb_7 — 1 month ago