2021 Orbea Oiz M10 TR

Review: 2021 Orbea Oiz M10 TR Pt 1 In which I get a new MTB that differs in wheel size, 1×12 gearing and full suspension from anything I’ve ridden before.

Review: 2021 Orbea Oiz M10 TR Pt 2 Second ride had the shock pressure set better. First inkling I would use the shock lever a LOT.

Review: 2021 Orbea Oiz M10 TR Pt 3 Thoughts after three rides. Maybe that 32 t chainring is right after all.

Review: 2021 Orbea Oiz M10 TR Pt 4 Thoughts after four rides.

Review: Maxxis Ikon, Ardent and Aggressor Not specific to the Oiz, but highly relevant to the Oiz.

Review: 2021 Orbea Oiz M10 TR Pt 5 Getting the cockpit adjusted properly requires a lot more stem.

Review: 2021 Orbea Oiz M10 TR Pt 6 On addressing a nagging seatpost creaking. A 36.4 clamp seemed to solve the problem.

Review: 2021 Orbea Oiz M10 TR Pt 7

Thoughts on various rider reactions, tweaks, adjustments, etc after 394 miles and about 28 rides.

Review: 2021 Orbea Oiz M10 TR Pt 8 In which the first XC race was completed on the bike.

Review: 2021 Orbea Oiz M10 TR Pt 9 Comparing the bike to my old hard tail on a race course.

Review: 2021 Orbea Oiz M10 TR Pt 10 Comment on the bike after the first 1,000 miles. The seatpost creaking has returned.

I know better The creaking problem was solved by cleaning and lubing the pivots after about 13 months.

Review: 2021 Orbea Oiz M10 TR Pt 11 Not much to add with about 1,900 miles on the bike. Still a great value and performance is as advertised and reviewed.


  • 4 linkage bearings 6800 10x19x5mm per the Blue paper
  • 2 main pivot bearings 6802 15x24x5 mm per the Blue paper
  • Headset Lower: IS52/40 or 40x52x7mm per the Blue paper
  • Headset Upper: “orbea specific”, 30.1×41.8x8mm 36/45 angular contact bearing, per the Blue paper, sure enough, cannot find this bearing at generic bearing places. and Orbea does not list it on their site. Installed upper bearing #2 around 18 months.


  • 666 mi, 6 months: Having to pump rear before riding off. Brakes retained function, even if bite point was really low. Lever bleed of brakes which improved function and feel, minimal air bubbles but there were some.
  • 1250, 12 months: First set of new resin J03 (stock) pads. Complete restoration of brake performance. Firm and high bite point.
  • 1600 mi, 15 months: Noticing brakes are back to good, rather than the awesome performance after the pad change. Stable state?


  • 666 mi, 7 mo: First new chain, Shimano XT 12 sp
  • 1523, 13 months: Second new chain, Shimano XT 12 sp. Noticed significant wear on the cassette.
  • 1523, 13 months: Shifting has been slow for at least 4-5 months, cable tension adjusting didn’t do much. Flipped off the derailleur clutch for a few rides and shifting improved. Lubed clutch! Shifting performance with the clutch on is restored.
  • 1800 mi, 18 months: Replaced cassette (Now on #2) and installed Chain #4. Suspiciously short life of Chain #3, possible fake. Replaced shift cable. Re-greased derailleur clutch with Park hi-performance grease.
  • 1850 mi, 22 months: Installed Shimano MT-800 Pressfit bottom bracket #2. Used Park primer and press-fit compound.


  • Maxxis Ikon (rear), Ardent (front): Stock tires. Removed after the first four rides. Put back on, months 10-11, for a race series. Run at 28-30 psi for the latter.
  • Maxxis Aggressor pair. Ran at 60 psi for first several months, then 40 for a couple. Settled on 28-30 psi at ~8 months. Rotated at 11 months after the race swap. Going strong with lots of tread left after about 1,400 miles.
  • Delium Steady, Light Construction put on the front at about 1800 miles, 19 months.
  • Delium Fast, Light Construction put on the rear at 2,054 miles, 23 months.


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