Orbea Rise (H15) rear thru-axle -- 187mm, too short?

[demount]

187mm seems a few mm short, judging by how much of the left axle nut is not filled by the axle. It almost looks like the left chain stay is completely riding on the axle nut. Anyone else seeing this on their rise?

 

[Jackware]

Looking at the online Bluepaper it shows the axle as 187mm. Are all the various spacers in their correct positions?

 

[demount]

Looking at the online Bluepaper it shows the axle as 187mm. Are all the various spacers in their correct positions?

View attachment 84551

Yes, it appears to be assembled correctly. I consulted the blue book, and the axle has 187 printed on it. That is why I was hoping to see if others are fitting the same way. The other thing I was suspecting is the wheel assembly, but if this is normal for this bike, then no point in taking anything apart.

 

[mark.ai]

Mine looks similar:

 

[demount]

Mine looks similar:

View attachment 84554

Big Thanks for the pic!!! I guess that is just they way they designed it, and that axle nut is heavy enough to carry the load of the rear stay. Seem like 190mm would have been better. Never had a through axle that doesn't thread to near the end of the nut. I wouldn't have even noticed if it hadn't come loose now like three times.

 

[Mikerb]

No it is not right. The torque figure is calculated based on all threads in the nut being used so with the thru axle falling short like that the specified torque is too low.....in other words the thru axle will come loose. I suggest you strip the assembly and check.

 

[BiGJZ74]

Big Thanks for the pic!!! I guess that is just they way they designed it, and that axle nut is heavy enough to carry the load of the rear stay. Seem like 190mm would have been better. Never had a through axle that doesn't thread to near the end of the nut. I wouldn't have even noticed if it hadn't come loose now like three times.

My H15 is exactly the same. but hasn't backed out yet...only 300 miles so far in about a month.

 

[MikeL_mtb]

My m10 looks the same, I noticed it, took things apart and couldn't see any other way of it working. It would make me feel better to get full thread engagement.

 

[b33k34]

No it is not right. The torque figure is calculated based on all threads in the nut being used so with the thru axle falling short like that the specified torque is too low.....in other words the thru axle will come loose. I suggest you strip the assembly and check.

Interesting - I've had the rear axles come loose on our two M10 Rises a few times over the last year.

 

[Mikerb]

No
The torque is calculated on the amount of threads on the axle being used and the thread pitch and axle diameter ,
obviously the axle and nut material is taken into account also .
The fact all the thread in the nut isn’t being used has no significance at all only that as much axle thread is being used as possible for its intended purpose.

....and that would be right if the nut was half its width........but its not!! You cannot work out torque settings based on a bolt and nut and then only use half the nut!!

 

[mark.ai]

So I had some Orbea Rise rear axle spare parts - and just opened the packs to compare them ...

The rear axle won't actually screw all the way into the nut as the thicker part of the rear axle blocks it once all the thread of the axle is inside the nut. This is the very maximum it will screw in:

And this is a comparison shot of the length of the nut compared to the length of the threads on the rear axle:

So it must be designed like this