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Re: Lightcarbon: LCR018-D (endurance all-road) Just finished my first build and my first ride of 85 km.

Frame: Lightcarbon LCR018-D 56 cm
Groupset: Shimano 105 Di2 52/36 11-36T 165mm
Wheel set: Elitewheels Edge 3.0 52mm
Saddle: Ryet 3D Carbon
Seat Post with zero setback

8,1 kg (with with pedals, computer mount, bottle cage, handlebar tape)


Unfortunately, the saddle is still causing problems. The seatpost stays in place after I greased the sliding surfaces of the clamp and the bolt, but the saddle tilts under load.
I’ve already tightened the clamp quite firmly, but I was careful because of the carbon struts (recommended torque: max. 5 Nm). Even so, the saddle tipped over when I hit a pothole. I haven’t used carbon paste yet.
What would you recommend I do next?
  • Tighten the bolts even more? (Unfortunately, a torque wrench won’t fit due to the design.)
  • Try carbon paste?
Do you have any tips?
July 21, 2026, 02:16:22 AM 		1
Re: Lightcarbon: LCR018-D (endurance all-road) https://geometrygeeks.bike/compare/triban-rc500-2019-l,lightcarbon-lcr018-d-2025-54,lightcarbon-lcr018-d-2025-56/


You buy the bike you want,

After compare geometrys LCR018 in 56 is more near your atual bike, if you feel good position wise on the Triban my opinion  is "i would go for a 56".

For me was the opposite, i was on a bigger frame 56 (3t Strada ) and i felt too stretch needed to have the sadle too far foward etc... , so i went with 54.

 
July 22, 2026, 04:58:37 AM 		1
Re: Lightcarbon: LCR018-D (endurance all-road) I think you just want to hear a specific answer which you already have given yourself between the lines.

July 22, 2026, 05:02:05 AM 		1
Re: Lightcarbon: LCR018-D (endurance all-road) https://geometrygeeks.bike/compare/triban-rc500-2019-l,lightcarbon-lcr018-d-2025-54,lightcarbon-lcr018-d-2025-56/

If you atual bike is good you want the numbers bellow to be similiar :

Reach
Stack
Seat Angle
Head Angle
July 22, 2026, 05:56:20 AM 		1
Re: Lightcarbon: LCR018-D (endurance all-road)
Quote from: Westman on July 22, 2026, 06:14:51 AM
Thank you very much. That's why I think 56 isn't a stupid choice, even if LightCarbon still want I pick the 54 size. I want something more comfortable/endurance than race/performance.

I don't know your conversation with LC but from what I see regarding stack.

54 is 34mm lower on paper. When you subtract 10mm for bearing cover, 10mm in spacers being suggested and 8mm of bar rise, you are now only 6mm lower.
56 is 16mm lower. Subtract 10mm for bearing cover and 8mm bar rise. You are now 2mm higher.

What are you looking for long term? Are you 100% content with the current Triban position and will NEVER want to go lower in the front end? The 56 will place you slightly higher with the bar slammed. 54 gives you the option to go lower in the future, if you decide. You can also do 15mm of spacers instead of 10mm to get 1mm lower than your current setup.

**Numbers are quick for reference but you would need to do some calculations for the headtube angle, stem angles, stem length and spacers to get it mm perfect.

POTOOOOOOOO really nailed it.

Quote from: POTOOOOOOOO on July 21, 2026, 11:12:32 AM
Stack and reach are interlinked - Depending on the amount of spacers you add, you may need a longer stem to compensate.

It’s gets complicated - hence suggesting a pre bike fit.

July 22, 2026, 10:15:46 AM 		1