Progressive 444 Series Shocks

The longer shocks will indeed provide a little more range of travel, which may itself provide some additional comfort. With regard to spring rate - if you're riding two-up at least 50% of the time, recommend you go with super-duty springs. That way, you'll get the most out of your two-up riding time!

Yeah, I've spent some time driving on LI ... ugh. Anyway - before you go that far, you may find these shocks to be of enough improvement to avoid having to replace anything else. No one, and I mean nobody - has complained about the ride getting worse after installing these shocks. The soft initial push on the shocks that gets progressively harder the more they're compressed really make a nice difference, especially on rough roads.

Yessir! All HD touring bikes use the same rear shocks, sometimes of different lengths - police versions and otherwise - so you just need to select the Road King from the 2006 model year and you'll get shocks that bolt right up. Get ready for a better ride!

That 2014 XL1200C would have come with 11.5" shocks from the factory.

Progressive recommends that standard duty shocks be for riders weighing less than 250 lbs. Any rider/passenger combination more than 250 lbs would be going for heavy duty shocks.

For your situation, it would be best to stick with the standard duty shocks. If your passenger is only with you a 1/4 of the time, you can simply crank up the preload to offer a little more comfort for the added weight.

The stock length shocks on the 2021 FLHXS Street Glide Special would be 12".

Most likely, what's causing the pain is that the shock spring rate is below what you require for a comfortable ride. It's mostly the spring rate, not the shock valving, that's causing the jarring effect when you hit the bumps. Second to that, comes to the quality of the valving of the shocks. In other words, you can have a great set of shocks, but if you're a 250 lbs. rider, and the springs on those shocks rated for a 160 lbs. rider, it's going to be a painful ride. Third to that, of course, comes the length of the shock. You can almost always put a shorter shock on the bike and have it work for your needs, so long as it's sprung correctly. All of that brings us to your particular situation. Progressive recommends heavy-duty shocks if you're over 220 lbs. solo and/or ride two-up at least 50% of the time. So be sure to take that into consideration when choosing the spring rate you need for your bike. And you're indeed correct, the 2010 model year Sportster Forty-Eight uses 11" shocks as stock. So be sure to choose that length in order to retain the stock ride height and overall handling characteristics. As far as the 412 versus the 444 shocks question goes, you will get a smoother ride out of the 444 series shocks. The internal valving is significantly better, and that's what really provides the feel you get when riding the bike. Yes, the 412 shocks will be a lot better than the stock items on your bike, without question, but if you were to compare the 412 against the 444 in a back-to-back ride over the same road, you'd find the bike handles better when the riding gets spirited as the 444 does a better job of keeping the rear end in contact with the pavement. That ability translates into better feel and consequently, more confidence in the bike's handling. Plus, with the 444 shocks, you have the ability to adjust spring preload by hand, whereas the 412 shocks require the use of the included C-spanner to do that. Being able to adjust preload on a whim is nice for situations such as picking up or dropping off a passenger.

You most certainly can order heavy-duty 444 shocks to fit your machine. Once you select your bike from our fit guide, you'll be presented with the available options to fit the exact model you have: color, spring rate and then shock length. For reference, the 2004 Ultra Classic shipped from the factory with 13" long shocks. So, unless you want to lower the rear end of your bike, choose the 13" option to retain the stock suspension geometry for your bike.

The OEM shocks that shipped with the 2007 FLHX measured 13" eye-to-eye. So long as you were to choose that length from our fit guide, there'd be no difference in 2007 FLHX ride height.

There's an old adage that says "you don't know what good suspension is until you've tried it." That certainly holds true with Progressive's shocks. For your particular needs, (assuming you're riding two-up at least 50% of the time), your best bet would be the heavy-duty spring rate shocks that are of the same length as stock. You'll find the ride quality is significantly improved and the bike will handle a lot better. In addition, since you're putting heavy-duty spring shocks on the rear of the bike, you'll want to match the front fork spring rate for the best possible ride. To do that effectively, check out the Progressive Heavy Duty Fork Spring Kit.

It really depends on what you're looking to get out of the bike. If you're want to improve the overall ride, then your best bet would be to stick with the same length shocks as OEM. Conversely, if you want to change the way the bike steers, then a different length shock may be what you're after. Generally, a longer rear shock will quicken steering at the expense of mid-corner stability. A shorter shock will do the opposite. In either case (improving the ride or changing the way the bike handles) the most important thing you should take into consideration is spring rate: standard or heavy-duty. With Progressive's Shocks, heavy-duty springs are best suited for solo riders over 220lbs. If you ride two-up and/or with a full load of luggage at least 50% of the time, it would be wise to employ heavy-duty springs there as well.

These shocks are charged with nitrogen that's separated from the fluid-controlled valving by an internal piston. The piston itself allows fluid volume to expand and contract with heat as you ride. In doing so, you get consistent performance from these shocks no matter how rough the road may get.

For the 2006 Honda VTX1800F, Progressive's 444 Series Shocks come in pairs. Progressive Shocks are sold in pairs for machines originally equipped with two shocks.