I check the fine print on motorcycle disc lock listings so you know exactly what size fits your rotor and what is actually in the box before you ride.
In the box
I check the fine print on motorcycle disc lock listings so you know exactly what size fits your rotor and what is actually in the box before you ride.
| Listing | Rating | |
|---|---|---|
| ARTAGO 30X14 Disc Lock | 4.8 | Amazon |
| RADIKAL RK48120L Chain + U Lock | 4.8 | Amazon |
| ARTAGO 32 Disc Lock | 4.7 | Amazon |
| KRASER KR50150 Chain + U Lock | 4.7 | Amazon |
| KRASER KR50+120L Chain + U Lock | 4.7 | Amazon |
| ARTAGO K202 Transport Bracket | 4.7 | Amazon |
| Urban UR74120L Chain + U Lock | 4.7 | Amazon |
| Lock Safety Cable | 4.7 | Amazon |
| URBAN UR6 Disc Lock | 4.6 | Amazon |
| Motorcycle Alarm Disc Lock | 4.6 | Amazon |
Marcus on abuse. The title names the specific size or shade you need to match your bike. Recent reviews often complain about the key not turning smoothly after rain.
I look past the star ratings to find the exact dimensions listed in the title, because a disc lock that is too small for your rotor is useless in the rain.
Check the Amazon listing for the specific size named in the title and read the recent reviews for complaints about rust or stiff keys.
Field note 1
ARTAGO 30X14 High-End Motorcycle Disc Lock 2in1
The title specifies a 5mm anti-drill body and a 120dB alarm, which is the core hardware you are buying for a standard disc brake setup. This is the fine print: you get the lock and the alarm, but the 5mm shank is the specific dimension that determines if it fits your caliper without forcing the mechanism.
Skip this if your disc has a non-standard spacing that requires a different shank length, or if you need a chain included, as this is a standalone disc unit. Recent reviews note that the alarm sensitivity can be triggered by wind or rain if the housing seal is compromised, so check the gasket before your first ride.
$159.00
Price copied from the Amazon listing when this was written. Check the live price.
Field note 2
RADIKAL RK48120L Premium Motorcycle Loop Chain Lock + Mini U Disc…
This listing names a 13.5mm link diameter and a 120cm chain length, which is the specific geometry for wrapping around a bike rack or pole. The box contains the chain and a mini U-lock, so you are buying a two-piece system rather than a single disc lock.
Skip this if you only need a disc lock for a garage, as the chain adds bulk and weight that may not be necessary for your trip. The complaint in recent reviews is that the mini U-lock can be difficult to align with the disc if the chain is wrapped too tightly, so plan your locking order carefully.
$73.53
Price copied from the Amazon listing when this was written. Check the live price.
Field note 3
ARTAGO 32 State-of-the-art Motorcycle Disc Lock 2in1
The title highlights an SAA Triple Locking mechanism and a 120dB alarm, which is the specific security feature that differentiates this from the standard 30X14 model. You are buying the lock body with the triple bolt system, and the size is designed for standard motorcycle discs.
Skip this if you prefer a simpler two-bolt mechanism, as the triple locking adds complexity to the locking and unlocking process. Recent reviews mention that the keys can be stiff out of the box, so lubricate them before you need to use them in a hurry.
$179.99
Price copied from the Amazon listing when this was written. Check the live price.
Field note 4
KRASER KR50150 High Security Anti Theft Chain Lock for Motorcycles…
The title specifies a 13.5mm link diameter and a 0.53-inch U-lock, which is the specific size for securing a disc brake. This is a two-piece kit, so you are buying the chain and the U-lock together, not just the disc lock.
Skip this if you need a longer chain for a larger bike or a different mounting point, as the 13.5mm link is the fixed dimension. The complaint in recent reviews is that the U-lock can be bulky to carry if you are not using the chain, so consider if you need both pieces.
$372.02
Price copied from the Amazon listing when this was written. Check the live price.
Field note 5
KRASER KR50+120L Motorcycle Chain Lock + Heavy Duty Mini U Disc…
The title names a 120cm chain and a heavy-duty mini U-lock, which is the specific length and type for parking garage security. This is a two-piece system, so you are buying the chain and the U-lock together, not just the disc lock.
Skip this if you only need a disc lock for a short stop, as the chain adds weight and bulk. Recent reviews note that the U-lock can be difficult to open if the keys are not aligned properly, so practice the motion before you need it.
$140.18
Price copied from the Amazon listing when this was written. Check the live price.
Field note 6
ARTAGO K202 Transport Bracket for ARTAGO 32 Disc Lock
The title specifies compatibility with 18 to 25 mm tubes or a motorcycle bolt, which is the specific mounting dimension for this bracket. This is an accessory, not a lock, so you are buying the bracket and the anti-vibration silentblocks, not the disc lock itself.
Skip this if you do not have an ARTAGO 32 disc lock, as the bracket is specific to that model. Recent reviews mention that the silentblocks can be difficult to install if the tube is not perfectly round, so measure your bike's frame before buying.
$36.96
Price copied from the Amazon listing when this was written. Check the live price.
Field note 7
Urban UR74120L Heavy Duty Chain Lock with Ring ø13mm/0.51in + Mini…
The title names a 13mm ring diameter and a 120cm extra length chain, which is the specific size for securing a bike to a rack. This is a two-piece kit, so you are buying the chain and the mini U-lock together, not just the disc lock.
Skip this if you need a shorter chain for a compact bike, as the 120cm length is the fixed dimension. The complaint in recent reviews is that the chain can be heavy to carry if you are not using the U-lock, so consider if you need both pieces.
$206.56
Price copied from the Amazon listing when this was written. Check the live price.
Field note 8
Lock Safety Cable for Motorcycle, 6.5 Feet, Disc Lock Reminder…
The title specifies a 6.5-foot length and an orange color, which is the specific size and visibility feature for this reminder cable. This is an accessory, not a lock, so you are buying the cable and the disc lock reminder, not the security device itself.
Skip this if you do not have a disc lock to attach the cable to, as it is a reminder tool, not a security measure. Recent reviews note that the cable can be difficult to thread through tight spaces, so plan your routing before you need to use it.
$10.99
Price copied from the Amazon listing when this was written. Check the live price.
Field note 9
URBAN UR6 Hi-Tech Motorcycle Disc Lock with Smart Alarm
The title highlights a 120dB alarm and A+ sensitivity, which is the specific alarm feature for this disc lock. This is a standalone unit, so you are buying the lock and the alarm, not a chain or U-lock.
Skip this if you need a chain for a bike rack, as this is a disc-only lock. Recent reviews mention that the alarm can be triggered by minor vibrations, so adjust the sensitivity setting to avoid false alarms.
$64.94
Price copied from the Amazon listing when this was written. Check the live price.
Field note 10
Motorcycle Alarm Disc Brake Lock, Motorcycle Locks Anti-Theft…
The title specifies an 110dB alarm and a 5ft reminder cable, which is the specific alarm volume and cable length for this disc lock. This is a standalone unit, so you are buying the lock, the alarm, and the cable, not a chain or U-lock.
Skip this if you need a higher alarm volume, as the 110dB level is the fixed specification. Recent reviews note that the reminder cable can be difficult to store if you are not using it, so consider if you need the extra length.
$19.99
Price copied from the Amazon listing when this was written. Check the live price.
Weather, weight, and packing
What is in the box for this motorcycle disc lock?
The listing specifies the exact contents, usually the lock body and keys, so you know what you are getting.
How do I know if the size in the title fits my bike?
Match the size named in the title to your rotor diameter to ensure a proper fit.
What is the most common complaint in recent reviews?
Shoppers often mention issues with the key turning stiffly or rust appearing after exposure to rain.
What Marcus will let get rained on
I do not fake a trail test. If the title will not talk weather or weight, I bounce it.
- Weather or weight shows up in the title when the job needs it.
- Photo from that Amazon listing.
- No fashion-camping SKU with no spec.
- Public rating when shown.
Confirm IP/weight on Amazon. This page is not a field report.