As confusing as it must be to someone asking a simple question about tires, most of the above advice is sound. The range of performance characteristics, build quality, and price on motorcycle tires is enormous. This leads to everyone, justifiably, having their own opinion on what is “best.”
“Best” is a moving target depending on what tire characteristics a rider values most. Whatever tire delivers the performance a rider prefers at an acceptable wear rate and an agreeable price will represent excellent value for that rider. This makes it difficult to provide truly objective tire recommendations without fully knowing a particular rider’s priorities and expectations.
I’m going to guess, possibly unfairly, if the OP is considering Shinko tires, he may be an average, recreational rider that just wants to have some fun on his bike now and again. He probably isn’t a die-hard, long-distance touring enthusiast. More likely, he mostly rides around on the streets but would gladly seize an opportunity to take a spirited run through the twisties, just for fun. That description fits a lot of us...our Walter Mitty ambitions aside.
Although I am usually one who will try something different or outside the realm of “popular wisdom,” tires on a motorcycle have such a huge impact on both performance and safety that I would stick with one of the proven, major brands. For me, there is just not enough price differential between the cheapest Chinese tires and something moderately priced but significantly better. This opinion comes from a rider of 60 years living on social security and a modest pension, so no money to burn here.
If funds are really tight, I’d second the motion to step up to the Dunlop GP-300 from any Chinese tire. While not the latest or greatest technology, I would trust them to get you down the road safely until you could afford something better. Really a minimal cost delta to upgrade to these.
Should you decide to go with Shinko tires despite considerable advice to the contrary, be aware that, like most tire manufacturers, Shinko makes a bunch of different tire models. You will likely find a wide range of performance characteristics, build quality, tread wear, and price within Shinko's line. Make sure you do some research and select wisely. When you determine the “best” offering from their line for your purposes, do compare the cost to the GP-300; you may be surprised at how little it costs to move up.
FWIW, I purchased my SV650 with a new GP-300 on the rear and an 1100 miles Dunlop Roadsmart 3 on the front. The GP-300 did not seem to compromise ride or handling in any significant way. I have since upgraded to matched, Dunlop Roadsmart IV tires in anticipation of upgrading my suspension. (This old, previously Ducati rider finds these upgrades the only necessities to make me really happy with the SV).
Note that a higher performing tire than the GP-300 could also represent excellent value for your purposes. Longer tread wear, better cornering grip, better wet grip, etc. are all available for more money up front. Some of these long wearing but higher performing tires may even provide a similar cost per mile despite their higher initial price. However, I understand well how that doesn’t matter if you simply don’t currently have the budget for them.
Beyond the above thoughts which I believe to be empirical, any specific tire recommendations I provide will be subjective (like everyone else), even if based on significant experience.
The Michelin Road tires seem to have a universal, positive acceptance. Good performance, reliable build quality, and outstanding wear. But they are REALLY expensive so perhaps not the best value when price is a major concern.
For many years I did not have particularly positive experiences with Dunlop motorcycle tires. This has changed completely since they were bought out by Sumitomo Rubber. Their plant in Japan is state of the art and the Roadsmart 3 and Roadsmart IV are built there. I like these tires in the sport touring class because they provide that balance of grip, wear, and cost that represents value for my needs.
The Dunlop Roadsmart 3 can be found for roughly $80 more a pair than the GP-300 and is a significant upgrade. This might be a sweet spot between cost constraints and performance, if the budget permits.
The Dunlop Roadsmart IV is claimed to deliver 23% more tread wear than the Roadsmart 3 but also improved wet and dry grip. IMO that puts the Roadsmart IV up in the class with the Michelin Road, but at a lower cost. However, even though the Roadsmart IV’s cost per mile could be very competitive, at somewhere around $160 more per pair than the GP-300, it’s probably not the right choice for the OP.
Final thought: I’ve never been loaded with dough, but I’ve never been sorry I bought the best tires I could afford for either my cars or motorcycles.
