Whether you’re parking a $100 beater bike or your multi-thousand dollar road bike outside you want to make sure to use a strong theft resistant lock to ensure the bike is still there when you come back. OnGuard’s new RockSolid 8590 U-lock is one of the lightest angle-grinder resistant locks on the market that provide maximum protection without extra bulk. With a retail price of $199.95, the RockSolid 8590 offers angle-grinder resistance while still only weighing 3lbs. The is also relatively small at only 3.55” by 6.9” with a 14mm diameter shackle. What makes this lock angle-grinder resistant is the diamond coating that eats through cutting blades and slows down potential thieves.
The OnGuard RockSolid 8590 U-lock is one of the lightest angle-grinder resistant locks on the market that provides protection without bulk.
| Retail Price | $199.95 |
| Rating | 9.0 / 10 |
| Measured Weight (in lb) | 3.04 |
| Likes | + Compact size for protection level + One of the lightest angle-grinder resistant locks + Wide enough to fit through bike frame |
| Dislikes | – Premium price – Too large to store on bike frame |
| Where to Buy (US) | OnGuard |
UNBOXING
The OnGuard RockSolid 8590 comes in a compact cardboard box with OnGuard logos printed onto it. Inside the box you’ll find:
- RockSolid 8590 U-lock
- 5 sets of keys
- Serial code tag
With so many spare keys and the serial code included, owners should never have to worry about locking themselves out as you can always use a spare or contact OnGuard to get a new key made using the serial code.
FIT & FINISH
Visually, the OnGuard RockSolid has a traditional u-lock design with a horizontal retainer bar and a U-shaped shackle that attaches to it. Despite the high security rating of the lock, the RockSolid is compact at only 3.55” x 6.9” and only weighs 3 lbs. That makes the lock light enough to easily travel with and can attach to a bike at various points with the 14mm diameter shackle. The exterior of the shackle has a rubberized coating with slots that reveals the diamond coating. It’s a unique treatment that makes the lock highly resistant to angle grinders and will require multiple blades and batteries before a thief could cut through the lock. The retainer bar is quite thick as it has a X4P locking mechanism which secures the shackle at four places to maximize protection.
A large yellow OnGuard logo is printed on both sides of the lock along with polished side caps that give the lock a premium look. The locking mechanism of the bike uses a key with a covered key slot that keeps weather and debris out of the lock. OnGuard includes 5 keys so you’ll have plenty of spares if you do lose one of the keys. The RockSolid 8590 is also one of the companies most secure u-locks and as a result has their highest anti-theft protection offer of up to $5001 for bikes. To qualify for the offer you are required to register the lock on the OnGuard website within 15 days of purchase as well as provide a receipt or appraisal for your bike. However, there are also quite a few caveats to the offer which includes the use of power tools so the offer is not a replacement for insurance or using common sense to avoid dangerous situations.
ON THE BIKE
As reviewers, we tend to cycle through quite a few bikes so having a high quality lock is crucial to ensuring our demo bikes don’t get stolen. The OnGuard RockSolid is part of the move toward angle-grinder resistant locks as battery powered angle grinders become more affordable and powerful. We were impressed how light the lock was and the relatively small size of it. Although it’s too large to comfortably mount on a bike frame, it’s light enough to put in a backpack or in a pannier. The rubber coating around the shackle and long length make it easy to fit over bike frames without scratching frames. Although you can never be 100% protected from bike thieves, it’s nice to see more angle-grinder resistant locks enter the market.
THE VERDICT
Overall, we found the OnGuard RockSolid 8590 u-lock to be well designed and compact for the level of protection. The lock offers angle-grinder protection without the bulk of previous generation locks thanks to the diamond coating and high-tech construction. That means the RockSolid 8590 is only 3lbs and can easily be carried in a bag. The lock is also easy to operate with a covered key slot and rubber coating that makes it easy to handle. We were impressed with the durability of it and the fact that OnGuard includes five sets of spare keys. The only negatives is that the lock is one of OnGuard most expensive locks and that it’s just a bit too big to store on the bike frame. That said, the OnGuard ROckSolid 8590 offers impressive protection while still being compact and portable.
Disclaimer: The product for this review was provided by OnGuard. The views expressed on this website are solely those of the authors and are here to help people make an informed choice before a purchase. The authors or the blog itself does not get any monetary compensation from the product manufacturer or third-party websites/vendor links that are posted here.