Whether you're upgrading your older 8-speed or you're replacing a worn-out derailleur, you'll want to get something that's never gonna let you down. The Shimano Acera RD-M3020-8 Rear Derailleur has Double Servo construction for smooth and precise shifting. It helps you ride challenging terrain with fewer interruptions. It is compatible with 7 and 8-speed setups and is compatible with HyperGlide 8/7/6-speed chains. This derailleur will work with a maximum low sprocket of 40T.
CALIFORNIA PROPOSITION 65 WARNING: This product can expose you to chemicals including (Cadmium, Phthalates, Bisphenol, Nickel (Metallic), di(2-ethylhexyl)phthalate "DEHP"), which is known to the State of California to cause cancer and/or cause birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
Most items SHIP SAME DAY if ordered by 3pm PST and FREE SHIPPING on orders over $50. Please note that oversize charges may still apply on some heavy or large items and free shipping does not apply to PO Boxes.
1-day free standard Shipping on most orders to California, 2-day free standard Shipping on most orders to Nevada, Arizona, & Utah. Other states can expect delivery within 3 to 5 days.
Jenson USA ships worldwide, including APO/FPO addresses. For a more specific shipping quote and transit time estimate, simply add the items you are interested into your shopping cart and look for the "Shipping Options" box at the top of the cart page. You don't have to login or create an account to see shipping charges and time in transit estimates.
Some manufacturers restrict where we can ship their products. If this item has shipping restrictions, they are listed below. If you'd like to buy an item that we cannot ship to your address, we can accept your foreign credit card and ship it to a US address for you.
Due to manufacturer restrictions, this product cannot be shipped to the following locations:
We strive to get you the gear you want at a competitive price. If you find an item we offer from a competitor at a lower price, let us know. We will do our best to instantly match their price. To qualify for the Price Match, your purchase must meet the following conditions:
We here at Jenson USA know it’s hard getting those items every year you didn’t ask for or need. What you really wanted was to get out there and put more miles on your bike! Well, we got you covered with some great ideas on items that will Keep you Pedaling!
There are so many different avenues that you can take to purchase a new bike, so what sets us apart from them? Why buy a bike from us?
Here at Jenson USA, we take great pride in making sure that your bike buying experience is confidence inspiring and trouble-free from start to finish. We want to be absolutely sure that we are providing the best possible service we can to each and every one of our customers so that there are no questions when purchasing a new bike from us!
At Jenson USA, it's important to us to support those who are helping build the community of riders and sharing their experiences with others. To that end, we've built an arsenal of Ambassadors that we help to support.
These ambassadors are the pedal-pounding aficionados, building a following of fellow riders across social platforms; they're the lifeblood of our cycling community. Their stories inspire, their passions unites – Their the glue that binds us all. Meet some of the Ambassador crew.
SRAM has completely redesigned the AXS line with the release of AXS Transmission! The new line of wireless shifting is drastically different, with a totally new way to mount the derailleur, extremely user-friendly installation tricks, incredibly durable builds across the entire line, and futuristic looks.
As the Tour de France is by far the most iconic and well-known bike race in the world, it also receives the most media attention and coverage. For this reason, the tour is the most likely cycling event to reach out and grab the attention of cyclists and non-cyclists alike, who may not regularly follow the pro road cycling calendar. Any new viewer will be quick to find out that the tour can be rather difficult to fully understand, as there is a plethora of dynamics that make up the racing. Every July, a new wave of curious viewers may need some basic decoding in order to fully understand everything there is to love about this epic race. Think of this guide as a “how-to” on watching the Tour de France. After all, road racing has been called “chess on wheels.”
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CALIFORNIA PROPOSITION 65 WARNING: This product can expose you to chemicals including (Cadmium, Phthalates, Bisphenol, Nickel (Metallic), di(2-ethylhexyl)phthalate "DEHP"), which is known to the State of California to cause cancer and/or cause birth defects or other reproductive harm. For more information, go to 