This is a genuine Triumph OEM tall passenger backrest sissy bar with pad. Attaches to mounting rail #A9738017 (not included) that has threaded screw holes on each side as shown in last pic. Mounting holes are right at 1.75 + apart. Feel free to ask questions.
Last pics are from the internet for reference only. I believe, but not positive, the A9738017 rail will fit the 01-10 bikes to allow installation of this backrest.
That rail accepts either a backrest or the seat grab rail. If you have the grab rail you remove it and install this backrest.
In good shape, not bent, no corrosion or scrapes. The Triumph badge on the back is missing and the pad has rub marks on front and a small nick in upper right rear corner that has been glued, see pic.
I'm unsure if this is still available from Triumph. The item "Triumph tall passenger sissy bar backrest 01-20 Bonneville Thruxton Scrambler" is in sale since Saturday, December 18, 2021. This item is in the category "eBay Motors\Parts & Accessories\Motorcycle Parts\Seats & Seat Parts\Backrests & Sissy Bars". The seller is "cyclefarm" and is located in Rutland, Iowa.This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, United arab emirates, Qatar, Kuwait, Croatia, Malaysia, Colombia, Antigua and barbuda, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Saint lucia, Montserrat, Turks and caicos islands, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Pakistan, Paraguay, Reunion, Uruguay, Russian federation.