Shimano SM-RT66 Disc Brake Rotor 6-Bolt 180mm
Shimano SLX SM-RT66 6-bolt disc brake rotors deliver consistent stopping power in all riding conditions. The disc brake rotor's reliable anti-loosen plate construction makes for quick and secure installation. For use with resin or metal pads. Includes rotor fixing bolts and non-turn washers. Easy to install anti-loosen plates help secure disc brake rotor bolts in place.
Shimano SLX SM-RT66 6-bolt disc brake rotors deliver consistent stopping power in all riding conditions. The disc brake rotor's reliable anti-loosen plate construction makes for quick and secure installation. For use with resin or metal pads. Includes rotor fixing bolts and non-turn washers. Easy to install anti-loosen plates help secure disc brake rotor bolts in place.
Shimano SLX SM-RT66 6-bolt disc brake rotors deliver consistent stopping power in all riding conditions. The disc brake rotor's reliable anti-loosen plate construction makes for quick and secure installation. For use with resin or metal pads. Includes rotor fixing bolts and non-turn washers. Easy to install anti-loosen plates help secure disc brake rotor bolts in place.
Shimano SLX SM-RT66 6-bolt disc brake rotors deliver consistent stopping power in all riding conditions. The disc brake rotor's reliable anti-loosen plate construction makes for quick and secure installation. For use with resin or metal pads. Includes rotor fixing bolts and non-turn washers. Easy to install anti-loosen plates help secure disc brake rotor bolts in place.
in 12 offers
The lowest price for Shimano SM-RT66 Disc Brake Rotor 6-Bolt 180mm right now is $14.38 at AliExpress.com - AliExpress-226247430, compared across 8 retailers.
The all-time low was $14.38 on 16 Oct 2026. That's the lowest price we've ever tracked — a great time to buy.
Prices last updated 16 Oct 2026.
Last updated at 16/10/2026 06:39:27
Bike Brake Rear Drum XT SM-RT86 SLX SM-RT76 SM-RT66 6 Bolts Brake Disc for MTB Disc Brake Six Nails 160mm 180mm 203mm Brake Rotor(Rt66 1 pcs 180mm)
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SHIMANO SM-RT66 Disc Brake Rotor 6 Bolt Type 160mm 180mm 203mm For Mountain Bike Parts 1PCS
Delivery $11.42
Shimano Rotor - RT66 - 180mm - 6bolt
Delivery $14.95
Shimano RT66 SLX 180mm 6 Bolt Rotor
Shimano SM-RT66 6-Bolt Disc Rotor - 180mm
Delivery between 22–27 Oct $9.50
Shimano Disc Brake Rotor SM-RT66 6-bolt 180mm
Delivery $11.95
Shimano, Rotor For Disc Brake, Sm-Rt66, 180mm, 6-Bolt Type
Delivery $64.96
Shimano Rotor For Disc Brake Sm-Rt66 M 180Mm 6-Bolt Type Bicycle Brake Rotors
Delivery between 22–25 Oct $29
originally posted on backcountry.com
Replaced stock tektro rotors 180 front and 160 rear. Quality of rotors is very good. Replaced pads as well. Make sure to bed your brand new rotors. Brake power has increased tremendously after 10-20 times pedaling from 3 to 10 miles per hour and after another 10-20 times from 3 to 15 miles per hour. No squeaks, no metal rubbing. Just silence while pedaling. Highly recommended rotor for your bike
originally posted on jensonusa.com
220mm is a joke, right? No. I've never said "less braking power please". If your trails are steep, this rotor is your friend. Cheapest brake upgrade you can make.
originally posted on jensonusa.com
I bought these rotors to replace a lower level rotor that came on one of my mountain bikes. I hesitated to step down from the XT rotors, which I've ridden for years and loved, but the price didn't make sense for the bike these were going on, which is mostly used for double-track and bike paths - and the occasional green/blue singletrack. If you're planning on doing a lot of heavy braking (e.g. downhill) think about going to XT or higher, but otherwise these brakes will serve you well.
| Product Dimensions | |
| Length | 9.5 in |
| Height | 1 in |
| Width | 5 in |
Bike Brake Rear Drum XT SM-RT86 SLX SM-RT76 SM-RT66 6 Bolts Brake Disc for MTB Disc Brake Six Nails 160mm 180mm 203mm Brake Rotor(Rt66 1 pcs 180mm)
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
SHIMANO SM-RT66 Disc Brake Rotor 6 Bolt Type 160mm 180mm 203mm For Mountain Bike Parts 1PCS
Delivery $11.42
Shimano Rotor - RT66 - 180mm - 6bolt
Delivery $14.95
Shimano RT66 SLX 180mm 6 Bolt Rotor
Shimano SM-RT66 6-Bolt Disc Rotor - 180mm
Delivery between 22–27 Oct $9.50
Replaced stock tektro rotors 180 front and 160 rear. Quality of rotors is very good. Replaced pads as well. Make sure to bed your brand new rotors. Brake power has increased tremendously after 10-20 times pedaling from 3 to 10 miles per hour and after another 10-20 times from 3 to 15 miles per hour. No squeaks, no metal rubbing. Just silence while pedaling. Highly recommended rotor for your bike
220mm is a joke, right? No. I've never said "less braking power please". If your trails are steep, this rotor is your friend. Cheapest brake upgrade you can make.
I bought these rotors to replace a lower level rotor that came on one of my mountain bikes. I hesitated to step down from the XT rotors, which I've ridden for years and loved, but the price didn't make sense for the bike these were going on, which is mostly used for double-track and bike paths - and the occasional green/blue singletrack. If you're planning on doing a lot of heavy braking (e.g. downhill) think about going to XT or higher, but otherwise these brakes will serve you well.
My bike came stock with the terrible resin-only Shimano rotors. These rotors are far and away the best bang for your buck. Nothing fancy, but work exactly as intended. I don't experience much noise with them aside from some occasional squealing in the rain. If you're running the resin-only rotors, do yourself a favour and upgrade to these before you do anything else to your bike.
Increased my rotor size to 203mm to help with some not so great calipers… (Shimano MT200). They certainly helped, but after upgrading the brakes to 4-piston Deore, it’s a completely different bike paired with these rotors. Super cheap compared to some of their counterparts too!
This is the rotoriest rotor of all the rotors I've ever rotored! It was straight and true out of the box. The included screws fit into my hubs (why aren't all bolts torx?)! The rotor fit between my pads! And, after bedding in, the pads grab the rotor as strongly as any other rotor I've used.While I give it 5/5 because bang for buck makes it silly to complain, if these were made of a material that didn't heat up and magically put material back onto the pad while riding so that the rotor and the pads lasted forever, they would be perfect.
I didn't have to mess with alignment with this new rotor, maybe I was lucky. I mainly am doing quick full stops, and not constant braking, so I didn't need a rotor that had more heat dissapation. Also like how these can take metal and resin pads. Good step up from the RT-56 resin-only rotors.
The Shimano brake rotors work perfectly well on my road bike. Kudos to Jenson for having the inventory on hand. I was impressed with how fast I got the two rotors and at a good price. The Park tool to separate brake pads makes replacing the pads a lot easier and quicker.
This bad boy is the answer for me: probably close to 250 lb fully kitted. It stops great with one finger and my blue-collar Guide 4-piston cheapo brakeset. I first fitted a 200 mm rotor and when I changed to this: vastly better.If it starts squeaking in wet conditions, I sand it radially (by hand) with 150 grit silicon carbide to remove that (pesky?) glazed look.Also, I upgraded a friend’s SC Chameleon (with $hitty 2-piston calipers) with these rotors f&r and swapped the pads for sintered ones. HUGE braking improvement. Night and day compared to the 180 mm rotors. Same calipers. Now the bike can stop on a descent!
I picked up the 203mm rotor and appropriate caliper adapter for my 2019 Giant Quick E+ to add some front braking power over the stock 180mm rotor. The difference is immediate and noticeable.I brake hard on long downhills and loaded up with gear, I'm riding with about 300 lbs (~200 with rider/pack, 50 for bike, 50 for kid/child seat). The 203mm rotor has been predictable and function as well as the ice tech rotors I have on my other MTB. I've not had aggressive MTB-style braking with these yet, but for urban riding they are hard to beat.And the price is fantastic. Highly recommend these, particularly in the larger models.
| Product Dimensions | |
| Length | 9.5 in |
| Height | 1 in |
| Width | 5 in |
