Choosing a tire set for a bike with a 21-inch front and a wide 240-section rear is a balance between look, grip, and daily usability. You need a matched pair that clears your fenders and handles the power without surprises. The Shinko 005 Advance set aims to deliver exactly that for riders who want a bold rear footprint and a front that can keep up.
Quick verdict
This set pairs a 120/70-21 front tire with a 240/40R18 rear tire, two sizes that commonly show up on custom cruisers, baggers, and performance builds. The asking price of $338.90 covers both tires, which is worth weighing against your existing wheels and whether you need a direct replacement or an upgrade. The tires are new, and the construction combines a bias-ply front with a radial rear as described in the sizing. That mix is not unusual, but it does mean the front and rear have different handling characteristics, so it is worth acknowledging before you ride.
Who this set suits
This set is for riders who already have a 21-inch front wheel and a 18-inch rear wheel with a 240-section tire. If your bike is set up for those sizes, this package gives you a matched pair from Shinko's 005 Advance line without having to piece together different models. The rear tire's 240/40 profile is a wide, low-profile look that fits the style of many cruiser and performance-touring builds. It is also a reasonable option if you are rebuilding a bike and need a complete front and rear set at a single price.
What stands out from the listed details
The description points to a large block-type tread pattern designed for strong braking, cornering, and acceleration. That is a useful trait for a bike with a lot of torque, where the rear tire needs to put power down without sliding. The tread grooves are described as specially designed to dissipate water efficiently on wet surfaces, which is a key consideration for a wide rear tire that might otherwise hydroplane. The rubber compound is formulated to improve grip and durability, and the tires are aramid belted to enhance high-speed performance. These features are all mentioned in the listing, so you are getting a set that is aimed at both traction and longevity.
Another detail that stands out is the speed rating. Both tires carry a V speed rating (up to 149 mph), which fits a high-performance motorcycle tire. The front tire is listed as bias-ply, while the rear is a radial (indicated by the R in 240/40R18). This matches the common practice of using a bias-ply front for stability and a radial rear for grip and heat management, as long as your bike is designed for that combination.
Meaningful trade-offs
Before you buy, make sure these exact sizes fit your bike. The 21-inch front and 240/40-18 rear are specific, and not every cruiser or custom build uses them. The set does not include wheels, as the listing notes, so you are only getting the two tires. Also, because the front is bias-ply and the rear is radial, the handling feel will be different from a set where both tires are the same construction. This is not necessarily a drawback, but it is a difference you should be comfortable with.
The $338.90 price is for the pair, which is a middle-ground price point for a matched set in these sizes. You are not paying a premium for a racing tire, but you are also not buying the cheapest options on the market. The aramid belting and the wet-road tread design add value, but you should confirm that the tires are compatible with your wheels and fender clearances before ordering.
Bottom line
The Shinko 005 Advance set is a practical choice anyone with a 21-inch front and 240/40-18 rear who needs new rubber. It gives you a matched front and rear pair with a tread pattern aimed at grip and wet-weather confidence, plus aramid reinforcement for high-speed stability. The mixed bias-ply front and radial rear is a detail worth noting, but it is not a dealbreaker. If the sizes match your bike and the price fits your budget, this set is a straightforward way to refresh your ride with a wide, aggressive look.
New Shinko 005 Advance Motorcycle Tire Set Front Rear 120 21" + 240/40-18 18
This product listing includes the front and rear tires together for $338.90. The front tire is a 120/70-21 bias-ply, and the rear is a 240/40R18 radial. The set is new, with a V speed rating and a tread pattern that the manufacturer describes as having excellent braking, cornering, and acceleration characteristics. The tread grooves are designed to move water away on wet roads, and the aramid belt enhances high-speed performance. The main reason to choose this set is that both tires are included in one purchase, saving you from matching separate sizes. The limitation is that the set is specifically sized for a 21-inch front and 18-inch rear with a 240-series tire, so it will only fit bikes that already run those dimensions. Wheels are not included.
