Shimano's SLX mountain bike groupset often plays second fiddle to the budget-friendly Deore and the high-end XT groupsets, but it's truly the workhorse of the line-up.

While SLX may not boast all the bells and whistles of its counterparts, it offers many premium features in a more understated package. Despite not having the complete spec list, SLX performs impressively well. 

A powerful fully bled SLX 4-pot hydraulic Servo Wave disc brake for more aggressive riding styles. 


  • Ice-Tech Finned Sintered pads, plus spare olives and insert should you wish to adjust the length of the cuttable hoses. 
  • Hinged clamp for quick installation
  • Forged alloy brake lever for optimum strength and reliability
  • Lightweight forged calliper design that increases rigidity and reduces weight
  • Hose length - 1700 mm Rear and 1000mm Front



  • Post mount (adapters not included)
  • Fully bled lever and calliper comes without adapters or rotors giving you the freedom to customise to suite your bike
  • Short stroke Servo-Wave mechanism for quick pad engagement and more power for aggressive riding
  • 4 oversized phenolic pistons optimized for heat insulation, lightweight and
  • Mineral oil brake fluid is non-corrosive and less hazardous than conventional hydraulic brake fluid
  • Shim-less mounting system allows for quick setting up
  • Brake lever featuring reach and free stroke adjustment
  • I-spec-EV compatible
  • E-bike compatible

Shimano SLX BR-M7120 4-Pot MTB Disc Brake

Rated 4.9 out of 5 stars
9 Reviews


Barcode: 4550170445782

Shimano's SLX mountain bike groupset often plays second fiddle to the budget-friendly Deore and the high-end XT groupsets, but it's truly the workhorse of the line-up.

While SLX may not... Read more

£124.95 RRP £174.99SAVE 28%

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  • Rear


Delivery Information

We have a range of delivery options on orders. Most importantly, if your order is over £50 then delivery is free!

All Biketart orders are fully trackable. You will get a tracking number by email when your order is shipped which will allow you to track it with Royal Mail or DPD.

In-stock orders placed by 4pm will be processed the same day.

Any items displaying "in-stock with supplier, despatched in 2-3 days" on the product page cannot be despatched the same day as they will be shipped to us from the supplier when you place your order.

Read on to discover the delivery options available to you on your order.

Delivery Services

Standard Tracked: All orders over £50 are eligible for free standard tracked delivery by Royal Mail. For orders under £50 there is a £2.99 charge. Orders sent using standard tracked are usually delivered in 2-3 days.

Priority Tracked: For £3.99 your order is sent by premium tracked delivery which gives a 1-2 day (including Saturdays) delivery timescale. This service is provided by Royal Mail who will usually deliver on Saturdays. Orders must be placed by 4pm.

Next Day Courier: If you require next-working-day delivery then this is provided by DPD and is £6.99. Orders must be placed by 3.30pm and be fully in-stock in order to be processed before our daily DPD collection.

Saturday Delivery: You can select Saturday delivery options from DPD at the checkout.

Bike Delivery: Bikes are always delivered by courier. After placing a bike order your bike is fully assembled and tested before being carefully boxed for shipping. Because of this build process it is not always possible to offer next-day delivery on a bike. Please do get in touch if you want to know a specific despatch day on any bike on our website. Call us on 01227 832582 or email

Returns Info

We offer a 30 day return period on our items. We ask that items are returned in their original packaging and in re-sellable condition. We do not pay returns postage.unless we have made an error with your order.

We cannot accept the return if the item is not correctly packaged and is damaged in transit during the return trip back to us.

    Please do not stick any tape or labels to the products branded outer packaging.

      If you require an exchange it is recommended that you re-order the correct size/item and return the item you do not wish to keep to us for a refund.

        Customer Reviews

        Rated 4.9 out of 5 stars
        Based on 9 reviews
        Total 5 star reviews: 8 Total 4 star reviews: 1 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
        100%would recommend this product
        9 reviews
        • CH
          Craig H.
          Verified Buyer
          I recommend this product
          Rated 5 out of 5 stars
          12 seconds ago
          SLX front brake

          Good quality brake and stops well, reasonably priced.

        • LC
          leon c.
          Verified Buyer
          I recommend this product
          Rated 5 out of 5 stars
          1 month ago

          I know people hit and miss on certain shimano brakes but if i am honest i wouldn't have chosen another brake combo slx is just amazing in terms of power,bleeeding, modulation ,feel and just overall setup. i managed to bleed it fairly well in around 5 to 10 mins and firmed up quickly been good so far no hot descents yet nor have i gotton a chance to pair it with the saint and not to mention the brake pads can be abit rattly but tbh thats a nitpick i put in different pads qnd its untill then its not a huge concern

        • RM
          Rogan M.
          Verified Buyer
          I recommend this product
          Rated 5 out of 5 stars
          2 months ago
          Brakes worked greet in the mountains of morocco

          Have just done 1400km in 6 days off road riding the Atlas Mountain Race in Morocco, just brought the front brake as wanted more.stopping power then deore 2 piston calipers. After bleeding and fitting the brake had no issues. Fully loaded bikepacking bike and pads not even half worn after those miles and 23,000m elevation. Can't believe it!

        • JM
          Jon M.
          Verified Buyer
          I recommend this product
          Rated 4 out of 5 stars
          6 months ago
          Decent brakes

          You need a bit of bike maintenance knowledge to fit this. It doesn’t have the stopping power I expected, changing from 4 pot Deore. He also suggested changing the disc as I’d previously used resin pads. I’ve cleaned the disc with isopropanol, but not tested since.

        • A
          I recommend this product
          Rated 5 out of 5 stars
          7 months ago
          5 Stars

          Serious brake kit 👌🏼

        Reviews LoadedReviews Added