DMR 12 point titanium bottom riser bolt set (2 bolts per order) in 2-1/4" and 2-1/2" lengths to fit most Harley Davidson motorcycles. Lengths are measured from under the head flange to the end of the bolt.  These are 1/2"-13 course thread pitch and available in natural titanium Silver, Red, and Black pvd coated. So these will not fade, corrode, or rust like other bolts. These are 3 times lighter than stock bolts weighing in at 2 ounces compared to stock bolts weighing 6 ounces. Lengths vary from different model bikes, aftermarket trees, and aftermarket bushings. Best way to determine your bolt length is to remove your stock bolt and measure. If you don't have the stock bolt or have put new trees on your bike, install the riser bushings you are using along with the top and bottom washer. Measure the thickness of the bushing with the washers. For example, if it measures 1-3/4" thick with the riser bushings and washers installed and you want a minimum thread engagement of 3/4" in your risers, then you would add 1-3/4" (1.750") plus 3/4" (.750") together which comes to 2-1/2" (2.500"). You would need the 2-1/2" long bolts. If you have solid trees with no bushing, then you would just measure the thickness of the trees where the risers bolt on. So if it's 1-1/2" thick and you want 3/4" thread engagement into the risers, then that comes to 2-1/4". Thread engagement should be a minimum of 1/2" on any riser but we prefer more if possible. It is your responsibility to determine the thread engagement.  Please check and double check your measurements. It is not our fault if you order the wrong bolt length. So please take the time and do it correctly. 

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