I have owned 34 motorcycles over the past 40 some odd years and have used Progressive fork springs on many of them. They always are a big improvement over the stock springs. I purchased this set for a 2007 HD Super Glide. The hardest part of the swap is getting the oil height correct, otherwise, it's relatively easy to do.
The bike handles much better and the ride is much smoother, particularly over small bumps. I was going to change out the rear shocks, but it rides so much better, I may not.
So far so good. Bought the 412 HD 13" to replace the oem shocks on my Kawasaki Nomad 1500. Delivery was good, installation was easy, and ride is very good so far. I have not had chance to get in much riding since buying but so far riding single or two up with the setting on #3 I like. I would recommend this product.
I ordered these as a replacement for the adapters being used to hold Guardian Bells on the bikes for my MC. I had to enlarge the small hole a tiny bit on one of the tabs, but the thinness of the material does not add any clearance problems on the bolts, and the stainless material does not add any danger of corrosion. They have worked well and are a LOT less expensive than the individual tabs sold elsewhere.
Well, they look great until you notice the top cap is plastic and not metal. Very cheap looking and will get scratched up very easily I fear. As to how well they work, I haven't actually installed them yet as I am still doing restoration work so won't know for a few more weeks.