Xiamen Carbon Speed 2025 new carbon crankset

[raisinberry777]

So this will work with the Magene P505 power meter, or am I being daft?  If so, that'd be great.  As Pat said, the P505 is a porker at 800g+.  (170mm & 52/36)

No, Magene uses its own proprietary interface for the P505 Base cranks, and does not make an Easton version for the P505 spider. Both XCadey and Sigeyi make power meters to suit the Easton crank interface.

[toxin]

What makes you think it would be p505 compatible?

[A.V.G]

What makes you think it would be p505 compatible?

I'm not familiar with the "easton mounting standard".  The Magene P505 PM spider is round and has four mounting bolts, not unlike those pictured in this thread (which are apparently compatible).  raisinberry777 set me straight.  I'm just not that into my p505.  I thought having a PM would be the final frontier, but the p505 added 100g+ to my bike, and the data isn't *that* useful.

[wintermute]

This is still more expensive for me than the Lexon/Ryet branded one on Ali.

What advantages does this offer? No 24mm yet?

[toxin]

with the lexon redesign to make it cheaper to produce, this is lighter

[Cnasta]

Looking for a crank + PM + chainrings for a new build. Would love it to be reasonably light, 165, 167.5 or 170mm cranklenght.

Love ordering via Peter, since I have nothing but good experience with him.

However, I have a few questions:

A lot of ppl seem to wait for:

• 24mm
• Titanium

What is the difference between 24 en 29mm? Why would you rather have 24mm?
For the titanium I guess its stronger or lighter (or both) than alu?

Furthermore, what powermeter (spider) and chainrings would you go for? I love a closed ring and riding 52/36.

[raisinberry777]

The main reason to wait for 24mm is for people with a BB86 frame, since a 29mm DUB crank (made of aluminium) requires the use of smaller bearings. 24mm needs steel or titanium - aluminium has a risk of shearing at those smaller diameters. Weight is roughly the same or slightly in favour of the aluminium cranks normally. If you have any other type of frame you might as well use the 29mm version.

Chinese PM options are XCadey or Sigeyi, they use the Easton interface.

Best Chinese chainring options are Stone or Pass Quest. Lexon is another option.

[Cnasta]

The main reason to wait for 24mm is for people with a BB86 frame, since a 29mm DUB crank (made of aluminium) requires the use of smaller bearings. 24mm needs steel or titanium - aluminium has a risk of shearing at those smaller diameters. Weight is roughly the same or slightly in favour of the aluminium cranks normally. If you have any other type of frame you might as well use the 29mm version.

Chinese PM options are XCadey or Sigeyi, they use the Easton interface.

Best Chinese chainring options are Stone or Pass Quest. Lexon is another option.

Thanks!

Since I'm going for a BSA BB frame, I can just as wel go for the 29mm spindle

[PoulB88]

For me, the biggest reason to choose 24mm is that with a BSA or BB86 frame, the bearings are very small for DUB and 30mm axles. So You have better durability (of course there is anecdotal evidence suggesting otherwise...) if you stick with a 24mm Shimano standard axle.

[toxin]

Bsa bearing are positioned outboard the bb shell. The only thing limiting the bearing size is the bb itself

[Sander2177]

Looking for a crank + PM + chainrings for a new build. Would love it to be reasonably light, 165, 167.5 or 170mm cranklenght.

Love ordering via Peter, since I have nothing but good experience with him.

However, I have a few questions:

A lot of ppl seem to wait for:

• 24mm
• Titanium

What is the difference between 24 en 29mm? Why would you rather have 24mm?
For the titanium I guess its stronger or lighter (or both) than alu?

Furthermore, what powermeter (spider) and chainrings would you go for? I love a closed ring and riding 52/36.

Probably repeating what everyone has said, but a 24mm spindle—especially in a BSA bottom bracket—means larger bearings, which naturally last longer.

I have a DUB Cybrei on my SL8, and since I have a press, swapping it is no big deal. Longevity isn't a major concern for me, but I do use steel bearings (SKF/NTN). I previously had a THM Clavicula with their ceramic bottom bracket, and it was terrible—bearings didn’t last, and as a heavier rider, it was noisy as hell when climbing out of the saddle. That was super annoying since I need everything to be completely silent. I ended up selling it and went back to my Dura-Ace crank before getting the Cybrei.

I’m currently running 54/38 MetAero Cybrei rings with an 11-34 cassette, paired with an X-Cadey power meter, which works fine. I’ll be testing this setup in Gran Canaria next week ahead of Mallorca 312 in April. We’ll see if my legs blow up—if they do, I might switch to 52/36 rings.

[Tom77]

In case someone wants to have good solution for BSA:

SRAM Red E1 arms (308g, DUB)
Sigeyi AXO (110g)
Shimano chainrings (147g)

Total 580g

[lidation]

Has anybody tried one yet?

[Sakizashi]

Probably repeating what everyone has said, but a 24mm spindle—especially in a BSA bottom bracket—means larger bearings, which naturally last longer.

I have a DUB Cybrei on my SL8, and since I have a press, swapping it is no big deal. Longevity isn't a major concern for me, but I do use steel bearings (SKF/NTN). I previously had a THM Clavicula with their ceramic bottom bracket, and it was terrible—bearings didn’t last, and as a heavier rider, it was noisy as hell when climbing out of the saddle. That was super annoying since I need everything to be completely silent. I ended up selling it and went back to my Dura-Ace crank before getting the Cybrei.

I’m currently running 54/38 MetAero Cybrei rings with an 11-34 cassette, paired with an X-Cadey power meter, which works fine. I’ll be testing this setup in Gran Canaria next week ahead of Mallorca 312 in April. We’ll see if my legs blow up—if they do, I might switch to 52/36 rings.

The bearings typically used for 30mm/29mm/Dub (6806 or 6806-29) and 25mm/24mm (6805 or MR2537) have the same size balls. BB86 is the only standard where you should want a 24mm axle.

[raisinberry777]

There's a mix regarding DUB and BSA bottom brackets. Despite not being limited by size, SRAM still use smaller bearings on BSA bottom brackets. Some other manufacturers like Wheels Mfg use 6806 bearings.

See here:
https://weightweenies.starbike.com/forum/viewtopic.php?t=165166

However, it's also worth considering that loads of major bike brands use either BSA or BB86 frames with SRAM builds and there are seemingly no reports of widespread issues.