MTB spider based power meter

[Vishal72]

Looking at getting a spider based power meter for the MTB.

Narrowed the choice down to the SIGEYI Axo and Power2Max Ngeco.

Would appreciate comments from anyone about their experience with these units

[DieselnDust]

Power2Max NG eco, there is no contest here.

it is proven, incredibly well supported by BicyclePower Trading and spares are easily available. The 2450 coin cell battery lasts at least 6 months with 5-6 rides per week in all weather conditions. The only weakness is the battery compartment cover buy BPT have a solution should the plastics tab give you trouble and the fix is elegant and secure. My NGeco is 6 years old  and it has never missed a watt

I haven't used a Sigeyi unit yet so I can't comment on the reliability or build quality.

[Tomik]

I've got both. Sigeyi on my GG. Both work perfectly. Had the Sigeyi for about 3 years, no issues. Been underwater with it too. I like the internal battery and IMO it is nicer looking than the NGeco that is on my mtb. 

The sealing rubber on the NGeco doesn't seem very robust. A friend's one fell off mid ride. 

[DieselnDust]

If the battery cover fell off , the plastic retaining tabs are damaged or broken. There’s an upgraded cover available from bicycle power trading 

[Titleist]

I have a Sigeyi, no issues and I like the rechargeable battery. It compares spot on with a 4iii and Quarq.

[Rudi Pollard]

I have Sigeyi on my road bike and mtb. Both working perfectly. Very easy to calibrate and I think I've had to charge them once since I've had them.