Join Date: Aug 2017
Location: Fresno aka Shake & Bake California
Bridgestone S21 vs Metzeler M7RR
I purchased my 2015 V-650 about one year ago and have put 12,000 miles on it since then. The previous owner had a set of Dunlop Q3ís on it when I bought it. They were pretty worn, but I managed to get another 1000 miles out of them. They were decent but not my favorite.
After reading glowing reviews about the Metzeler M7RR, I decided to try a pair. All I can say is wow what a great tire. Super grippy, smooth soft ride, not an evil bone in them. A very comfortable, soothing sort of feeling. Kinda like putting on your favorite pair of house slippers.
Fast forward to a couple of months ago. Reading about the latest Bridgestone S21 tires then seeing a pair advertised at a great price, plus a $50 rebate I decided to try a pair. Stuck them in my closed til my M7ís finished their duty.
Installed them yesterday, scrubbed them in this morning and did a 60 mile ride. I always find it interesting how tires can really change the character and feel of a bike.
Here is the score card so far;
The first thing I noticed was that the S21 tended to fall into the turn. More noticeable at slower speeds. The M7 has a very linear turn in at any speed, giving it a very different feel. The different profile on each tire would account for this.
The S21 is a heavier tire with stiffer side walls resulting in a slightly stiffer, bumpier ride. Not a big difference but noticeable. This also made the S21 more difficult to mount on the rim and inflate. I also noticed the heavier weight effected how my suspension worked (more un-sprung weigh). Handling was spot on with the M7ís, so may have to adjust the clickers to compensate for the S21ís extra mass.
The S21 is a bit slower in fast translations, not changing direction as quickly and effortlessly as the M7. The S21 boasts of longer tread life. This could be due to deeper tread depth. M7 new rear tire was 4mm, with 3mm on the front. S21 rear is 5mm and front is 4mm. The extra mm is probably a factor in better tread life.
At the end of the 60 miles I decided I actually like the S-21. Itís different but in a good way. I will update this when I get a couple thousand miles on them.
Cookin Wid Gas
2015 V-650 of course it's green...it's a Kazawalski.