Magene P515 PES Spider Powermeter

[Picograms]

It was $30 shipped to US to replace the faulty bolt on my P505. I'd think it would be similar.

I got an answer from Magene, they can send one for 35$

I was in a similar situation.  Put in a plastic shimano "bolt".  No issues with it at all

Wait, they are interchangeable with Shimano's preload bolt? if they are compatible the only thing i can see go wrong is the fact that for Magene you are supposed to torque the bolt to over 10Nm

[bichler.bua]

Wait, they are interchangeable with Shimano's preload bolt? if they are compatible the only thing i can see go wrong is the fact that for Magene you are supposed to torque the bolt to over 10Nm

Magene uses only one bolt for tightening the crank arm to the axle (vs. two bolts Shimano).
In the beginning with the P505 the preload bolt was different, "simple" Shimano one piece design.
But quite some users lost the preload bolt and then the crank became loose.
Since then, Magene changed the preload bolt to the two piece design and I would strongly recommend to use it as I don't believe a one piece Shimano preload bolt will reliably fix the crank to the axle.

[wektor115]

Magene uses only one bolt for tightening the crank arm to the axle (vs. two bolts Shimano).
In the beginning with the P505 the preload bolt was different, "simple" Shimano one piece design.
But quite some users lost the preload bolt and then the crank became loose.
Since then, Magene changed the preload bolt to the two piece design and I would strongly recommend to use it as I don't believe a one piece Shimano preload bolt will reliably fix the crank to the axle.

Do you know if it's possible to buy this new bolt anywhere for users with the old system?

[00Garza]

I was in a similar situation.  Put in a plastic shimano "bolt".  No issues with it at all

I did that for a local race when the bolt got lost the day before the race.
The plastic bolt fits, but its not a long term or ideal solution. It doesn't bear the load the same way as the magene bolt. Someone reported the crankshaft splines getting worn down and not staying in place after using the plastic bolt because it allows flex and movement in that area.

[bichler.bua]

Do you know if it's possible to buy this new bolt anywhere for users with the old system?

I can not remember how I got my replacement bolt, through the AliExpress seller or from Magene directly.
After I lost the first version preload bolt, I ordered two pieces of the new two piece design, to have one spare just in case.
In the P505 thread there are multiple users that have shared how to get replacement through AliExpress sellers, Magene directly or even through Panda Podium.
Example here
https://chinertown.com/index.php/topic,4569.msg101586.html#msg101586
I am not sure if there are local sources, I guess most people have received replacement from Asia (incl. waiting time).
I remember, that I used an aluminum preload bolt from AliExpress (Shimano style fits) in the meantime while waiting for the Magene part.

[SaunaBiker55]

Wait, they are interchangeable with Shimano's preload bolt? if they are compatible the only thing i can see go wrong is the fact that for Magene you are supposed to torque the bolt to over 10Nm

Yeap.  I put some blue loctite on the single bolt threads and haven't had an issue on either of my bikes with a 505.  I won't speak for anybody else, bit I'm not sure how you wouldn't feel a loose crank arm before it falls off.

[alfiomotrambo]

I saw that on aliexpress there are aluminum mounting bolts, maybe it's right for you https://it.aliexpress.com/item/1005005067241357.html

[Eoghan]

Hi everyone,

Saw another very usefully written question, so ripping off the formatting for mine if that’s ok to keep things clear!

Basically I’d like to confirm the compatibility of the Magene P515 powermeter crankset with my current bike setup and make sure I have all necessary tools and components before starting the installation.

I want to be sure that everything is compatible before I order it.

My current bike setup:
* Bike: Specialized SL7 (https://www.specializedconceptstore.co.uk/shop/bikes/road/2024-tarmac-sl7-sport-shimano-105-430053/option/)
* Groupset: Shimano 105 12 Speed
* Bottom bracket: Shimano Threaded BSA BB (I think 68mm BB shell width on frame)
* Crankset: Shimano 105 12 Speed (24 mm spindle, 52/36 chainrings front)
* Front Derailleur: Current Shimano 105, Braze-on, but I have a SRAM RED eTAP AXS braze-on derailleur that I’d like to use going forwards - I’ve heard that there can be some issues with the P515 fitting with some derailleurs?

Magene PES 515 Info I've found:
* Comes with PES20 crank arms (24 mm steel spindle)
* Uses standard 110 mm 4-bolt BCD
* I’d like to use my current 105 52/36 110 BCD chain rings until they’re worn out, will these fit?

My main questions:
1. Is the Magene P515 crankset fully compatible with my bike (Shimano Threaded BSA BB, 105 110 BCD)?
2. Can I reuse my existing 105 chainrings?
3. Can I use the existing BB?
4. Do I need any spacers external to the BB to space the cranks?
5. Are there any proprietary tools or parts required?

Any confirmation or corrections would be much appreciated. Thanks!

[alfiomotrambo]

It's nice to read such clear questions, I'll try to answer quickly:

1. Yes, the Magene P515 crankset is fully compatible.
2. Yes, absolutely.
3. Yes, absolutely. It would have been a problem if I had chosen the TEO instead of the P515.
4. Are there spacers included in the package? It depends on the q-factor, but generally not.
5. No, you just need hex wrenches and a torque wrench.

[Eoghan]

Perfect! Thanks for the clear and quick reply!

[ediryppah]

Perfect! Thanks for the clear and quick reply!

You need a BB tool that can go over the spindle to tighten the lockring

Can be had for €5 on AliExpress, and don’t bother with one that has the square cutout for a torque spanner, I don’t think it’s needed.

[alfiomotrambo]

I forgot, that wrench isn't included in the package https://it.aliexpress.com/item/1005005475463345.html

Tighten it as much as you can, without worrying about the torque.

[toxin]

This reminds me, could someone please take top down photos of both sides of the tool? I've lost kine and will have to make a replacement eventually.

[naiboo]

I've purchased some months ago a p515, I wanted to install it today. I experience play in installing the spider, even with fully tightening the lock ring. Is this normal?

[SirBikealot]

I've purchased some months ago a p515, I wanted to install it today. I experience play in installing the spider, even with fully tightening the lock ring. Is this normal?

nope, that's definitely not normal. I would send that video to the support. They should have a solution which, if i have to guess, is a new crank arm.