Shimano SLX SM-RT66 6 Bolt Disc Rotor - 180mm
The Shimano SM-RT66 6-Bolt Disc Brake Rotor is built for riders who demand reliable braking performance across all conditions. With a robust design and easy installation, it delivers consistent stopping power whether you’re on the road, trail, or downhill run. Consistent Braking Power delivers stable, predictable performance in dry and wet conditions. Larger rotor sizes provide extra stopping power, with the 220mm rotor offering up to 10% more braking force than 203mm. Anti-loosen plate construction makes installation quick, safe, and secure. Works with both resin and metallic brake pads.
The Shimano SM-RT66 6-Bolt Disc Brake Rotor is built for riders who demand reliable braking performance across all conditions. With a robust design and easy installation, it delivers consistent stopping power whether you’re on the road, trail, or downhill run. Consistent Braking Power delivers stable, predictable performance in dry and wet conditions. Larger rotor sizes provide extra stopping power, with the 220mm rotor offering up to 10% more braking force than 203mm. Anti-loosen plate construction makes installation quick, safe, and secure. Works with both resin and metallic brake pads.
The Shimano SM-RT66 6-Bolt Disc Brake Rotor is built for riders who demand reliable braking performance across all conditions. With a robust design and easy installation, it delivers consistent stopping power whether you’re on the road, trail, or downhill run. Consistent Braking Power delivers stable, predictable performance in dry and wet conditions. Larger rotor sizes provide extra stopping power, with the 220mm rotor offering up to 10% more braking force than 203mm. Anti-loosen plate construction makes installation quick, safe, and secure. Works with both resin and metallic brake pads.
The Shimano SM-RT66 6-Bolt Disc Brake Rotor is built for riders who demand reliable braking performance across all conditions. With a robust design and easy installation, it delivers consistent stopping power whether you’re on the road, trail, or downhill run. Consistent Braking Power delivers stable, predictable performance in dry and wet conditions. Larger rotor sizes provide extra stopping power, with the 220mm rotor offering up to 10% more braking force than 203mm. Anti-loosen plate construction makes installation quick, safe, and secure. Works with both resin and metallic brake pads.
in 25 offers
The lowest price for Shimano SLX SM-RT66 6 Bolt Disc Rotor - 180mm right now is $30.96 at Lordgun.com.au, compared across 25 retailers.
The all-time low was $6.00 on 18 July 2024 — today's price is 416% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 8 Oct 2026.
Last updated at 08/10/2026 18:27:35
Shimano Brake Rotor SM-RT66-M, 7.1 inches (180 mm), 6 Bolts, Narrow Type ESMRT66MP
Delivery $19.78
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 Diameter 180 mm
Delivery between Fri – Mon $40.54
Shimano SLX SM-RT66 Disc Rotor 180mm 6-Bolt
Delivery between Sat – Wed $9.99
SLX SM-RT66 6-Bolt Disc Brake Rotor
Delivery between Mon – Thu $9.90
Shimano SM-RT66 Disc Rotor SLX 6-Bolt
Delivery $20
Shimano SM-RT66 SLX 6-Bolt Disc Rotor - 180mm
Delivery between 14–16 Oct $9.95
Shimano SM-RT66 SLX 6-Bolt Disc Rotor - 180mm
Delivery between 14–22 Oct $9.95
Shimano SM-RT66 Disc Rotor 180mm SLX 6-Bolt
Delivery between 9–19 Oct $12.95
Shimano SLX SM-RT66 6 Bolt Disc Brake Rotor - 180mm
Delivery $12.90
Shimano RT66 6-Bolts Brake Disc - 180mm
Delivery $64.99
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
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.
| Bicycle Type | Mountain Bike |
| Brake Type | Disc brake |
| Groupset Compatibility | SLX |
| Size | 180mm |
| Weight | Approx. 135 g (for 160mm) |
Shimano Brake Rotor SM-RT66-M, 7.1 inches (180 mm), 6 Bolts, Narrow Type ESMRT66MP
Delivery $19.78
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 Diameter 180 mm
Delivery between Fri – Mon $40.54
Shimano SLX SM-RT66 Disc Rotor 180mm 6-Bolt
Delivery between Sat – Wed $9.99
SLX SM-RT66 6-Bolt Disc Brake Rotor
Delivery between Mon – Thu $9.90
Shimano SM-RT66 Disc Rotor SLX 6-Bolt
Delivery $20
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.
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.
What you see is what you get. Disc comes with lock washers and 6 star head screws that have a dab of blue lock-tite on the threads. Note: I could not find torque Recommendations in the packaging so I looked Online and the recommendations I could find suggested 2-4 nM torque on the screws. My torque wrench would not click while trying to tighten screws at 3 nM and the heads began to strip. Screws come with blue lock-tite so my rec is to tighten till snuck but don't try to get 2-4 nM or you may strip the heads. I wish Shimano would put torque recs in a prominent place on the box or inserts.
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.
| Bicycle Type | Mountain Bike |
| Brake Type | Disc brake |
| Groupset Compatibility | SLX |
| Size | 180mm |
| Weight | Approx. 135 g (for 160mm) |
