Hope Pro II 20mm Front Hub and Notubes ZTR 355 Review

Pro Reviews

Hope Hub Conversion

Here is the hub body and the 3 conversion pieces, left to right are the 9mm, 15mm and the 20mm.

Switching between the various sizes is pretty easy and only takes a few minutes. Here the conversion to the 9mm on an empty hub body. Just simply insert the converter and give it a good push. The 9mm and 15mm converters fit inside the cartridge bearing while the 20mm snugs up against the bearing.

Here is the conversion to the 15mm on an empty hub body. Just like the 9mm a good push and the converter snugs into the bearing. A small O-ring seals and keeps the 9mm and 15mm converters snug in the hub body.

Here is the 20mm conversion, just drop the 20mm converter onto the cartridge bearings and then use a ballpoint pen to sit a small clasp into a small groove; this locks the converter onto the hub.

“The numbers all go to eleven. Look, right across the board, eleven, eleven, eleven and…”

The 9mm and 15mm are pretty snug after insertion and can sometimes be freed with a good outward tug or else a simple squeeze in the vise on the converter end and a wiggle of the hub body gets them off. “How would you like to have a sexual experience so intense it could conceivably change your political views?”

The removal of the 20mm converter requires a screw driver to pry up the small clasp and it then the converter pops right off. Hope has a nice video of the conversion process at http://www.hopegb.com/page_mep_force_32.html. Hope has some great technical videos of their product suite, with very in depth and easy to follow steps for maintenance and repair of their hubs and brakes. “My mind is a raging torrent, flooded with rivulets of thought cascading into a waterfall of creative alternatives.”

Here are some weight readings for the Hope Pro II 20mm front hub, the hub body and the conversion pieces for the weight weenies and all those who rejoice at the all mighty scale altar. How many scales do you own? How precise is your scale? Do you take a scale with you when shopping for bike parts and leave the wife and kids at home? Do you know how much something weighs in grams for small parts but for a full bike and/or frame you use pounds? How weird is that?

Hope Pro II Weights

  • Hope Pro II body- 145.9g
  • 20mm converter – 24.3g
  • 9mm converter – 37.4g
  • 15mm converter – 31.4g
  • Hope Pro II 20mm – 170.2g

Continued on next page

About the author: Brian Mullin

Brian has been part of the Mtbr team since 2007, where he has become an integral member of the review and test staff, specializing in technical articles. He likes to push the limits in all the sports he obsesses in, whether it's mountain biking, whitewater kayaking, extreme skiing, or sport climbing. He takes those same strengths and a good dose of insanity to his reviewing and writing on mountain biking products, creating technical, in-depth and hyperbolic articles. Whenever he's not on the bike, he might be found watching MotoGP racing, otherwise look for him out on extremely technical singletrack.


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  • slcpunk says:

    I have the WTB laserdisc light hubs (basically same as AC, right) and I was thinking about this problem this weekend…how much of a difference is there between the hub shells on these hubs (AC vs. Hope)? If you take apart your AC hub (remove the QR caps) don’t you basically have the same thing as the HOPE hub? If the bearing sizes are different, would it be possible to just replace with bearings that made the setup match? ( just have to match the inner diameter of the HOPE hubs) Just curious on how creative you could get here, but it seemed like it might be simple for WTB or AC to made those little conversion parts and make their hubs convertible too.

  • Brian Mullin aka pastajet says:

    Let me check my AC hub when I get home tonight. I am not sure what the new AC hubs look like, perhaps at the show in 2 weeks I will have further information.

  • luke says:

    What’s with all the random quotes, they seem to almost relate to your review but not quite. Are you just another twisted bike rider? Good review by the way, but isn’t time really the test for a hub? I mean, can you tell from a couple of rides if this is the one you want to depend upon?

  • pastajet says:

    Yes I am warped. Are the quotes supposed to relate to the review or just my demented mind? I only have so much time to do a review unless it’s an extremely long term one. I have ridden the wheel for around 5 weeks now which is around 15 hard rides on abuse terrain so I have a pretty good idea of how they ride and their durability. In regards to long term longevity that I can only conjecture. It is going to be pretty rare to have many media reviews that are 6 months to a 1 year long. Check back on my blog and I will strive to keep an active long term section for all my review products. It is fun to do reviews but it is also a lot of work. You need to keep track of your testing and try and be as objective as possible and then you need to create an interesting review for the reader, which I always try my utmost to accomplish. Entertain!

  • Alan says:

    “You’re flunking English. That’s your mother tongue, and stuff.”

    Nice pull. From “The Sure Thing”. A classic Cusack 80′s movie.

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