Before buying the Cravot Mastjack, I had been assembling and working on e-bikes in my garage without a repair stand. It worked, but it was definitely a pain—especially as the bikes got bigger and heavier. Since I was also considering opening an e-bike shop, I finally pulled the trigger and bought the Mastjack.
The stand arrived in two boxes and was surprisingly easy to assemble. Once together, I immediately started putting it to work on a pretty wide variety of e-bikes. I've used it with everything from a small kids' moped-style e-bike all the way up to a Wallke H7 weighing over 100 pounds. The Mastjack has handled them very well and feels extremely solid with a heavy bike on it.
One of my favorite features is the lifting system. You can raise and lower the mast using a drill, which makes lifting a heavy e-bike incredibly easy. There is also an included hand crank, but in my opinion, it takes way too long to raise or lower the mast manually. Once you've used a drill, you're probably not going back to the crank.
I also really like the rotating clamp. Being able to rotate the bike—even completely upside down—can make certain repairs and adjustments much easier.
That brings me to the one area where I think Cravot could make an important improvement.
I would like to see larger and stronger hardware used to secure the clamp to the rotating arm. While I was rotating one of my bikes, one of the bolts snapped. This caused the clamp to rotate uncontrollably and the bike hit my garage floor. Fortunately, the bike wasn't damaged.
I drilled out the broken bolt, tapped the hole, and replaced it with a hardened bolt. I haven't had an issue with it since, but considering the weight of the e-bikes this stand is designed to handle, I think stronger hardware should be used from the factory.
Despite that incident, I would still recommend the Cravot Mastjack. I've worked with some very heavy e-bikes on it, and I believe it's one of the strongest e-bike repair stands available. The ability to easily raise and lower a 100+ pound bike makes working on these machines dramatically easier than trying to do everything at floor level.
If you regularly assemble, maintain, upgrade, or repair your own e-bikes—especially heavier fat-tire or dual-battery models—I think a heavy-duty stand like the Mastjack is well worth the investment.
**Pros:** Extremely sturdy, handles 100+ lb e-bikes, easy assembly, drill-powered lifting is excellent, and the rotating clamp is very useful.
**Cons:** The hand crank is slow, and I believe the clamp-to-rotating-arm hardware should be upgraded to stronger, larger bolts.
**Bottom line:** Even with the bolt failure I experienced, I would buy the Mastjack again. For anyone who regularly works on heavy e-bikes, having a stand capable of safely getting the bike off the floor and into a comfortable working position is a game changer.
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