image of Shimano CS-HG20 7 Speed Cassette 12-28T

Item: 537318

Shimano CS-HG20 7 Speed Cassette 12-28T


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  • Description
  • Specification
  • Reviews
  • Delivery Options
  • Help & Advice
  • Price Match
  • Buying Options

    The Shimano CS-HG20 7-speed Cassette works beautifully thanks to its ultra lightweight design and HyperGlide precision engineering which ensures that all of the teeth work perfectly with the entire gear system. This makes shifting smooth and sublime, just like you'd expect from Shimano.

    SHIMANO CS-HG20 7-SPEED CASSETTE 12-28T Extra Info

    • Precision engineered to ensure each tooth works perfectly with the chain
    • Corrosion resistant steel lock ring
    • Designed for super narrow 7-speed HG chains

    Products You Can Trust
    For your peace of mind, Halfords ONLY stock genuine Shimano Components. Genuine Shimano products are sold with original Shimano packaging and instructions (where supplied), and benefit from a 2 year manufacturer's warranty.
  • Material: Steel
    Speed Type: 7 Speed
    Type: Cassettes
    Weight: 270g
  • Rated 4.8 out of 5┬áby 8 reviewers.
    Rated 4 out of 5 by Cheap cassette I was recently given an old Raleigh seven speed road bike from 1990. The gearing was a brutal 42/52 at the front and 13-23T at the rear. I needed to lower the gearing and this was a cheap option. I would have preferred to go to 32T on the rear, but the original, short rear mech may not have coped with this. I fitted the new 12-28T with no problems it worked perfectly with the existing mech. When this one wears out, I may buy a higher spec cassette. 27 May 2016
    Rated 5 out of 5 by Good Thus is another great Shimano cassette the best way to get the bike parts is from here 09 October 2015
    Rated 5 out of 5 by Shimano 7 speed cassette Quality as expected from shimano,great price from HALFORDS,would highly recommend this product to any MTB enthusiast to buy as an uograde ,A+ 20 September 2015
    Rated 5 out of 5 by Good if you can get one! Best value cassette on the web and can pick up at local store. What more can you ask? Well you can ask for the website stock levels to be a true reflection of those in store. You can also ask that the store puts aside the one you actually ordered. Having said this the staff in store did their utmost to rectify the situation including an offer to hand deliver the item the next day. In the end I came away with a £5 voucher and reordered on the website for pick up next day. 30 July 2015
    Rated 5 out of 5 by Good I like this product good I alw like the halford products 02 March 2015
    Rated 5 out of 5 by Rear Cassette MTB Great replacement part. Should have done it ages ago and can not complain at the great price. 19 February 2014
    Rated 4 out of 5 by collect in store ordering Product is great value for the price and speed of service was fantastic. would certainly recommend and dare I say it much cheaper than my LBS 14 February 2014
    Rated 5 out of 5 by Good Cassette It's a perfectly good 7 speed cassette. Like all cassettes, the CS-HG20 is easy to fit if you have the right tools. If you don't have the tools or don't want to get your hands dirty, find a bike mechanic to fit it. 05 February 2014
    • 2016-07-27 T12:16:25.095-05:00
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    • Standard Delivery

      FREE within 4 working days on all orders over £30 (Halfords products only)

    • Next Day Delivery

      Order by 8pm for delivery tomorrow (Mon - Fri)

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    • Saturday Delivery

      Order by 8pm Friday for delivery on Saturday

    • Sunday Delivery

      Order by 8pm Friday for delivery on Sunday

    • Morning Delivery

      Order by 8pm for delivery 8am - 12 midday (Mon - Fri)

    • Afternoon Delivery

      Order by 8pm for delivery
      12 midday - 6pm (Mon - Fri)

    • Evening Delivery

      Order by 8pm for delivery 6pm - 9pm (Mon - Fri)

  • Halfords Price Match

    Here at Halfords we always want to make sure we're offering you a first class service and products at competitive prices.

    To ensure we keep our Price Promise to not be beaten on cost, we monitor the prices offered by our competitors daily and adjust our own pricing accordingly.

    So, What's Halfords Price Guarantee?

    If you find a cheaper price we'll match it, and if you find it after you've purchased from us we'll refund the difference within 7 days of receipt of your goods.

    Simply take a print out of the competitor's online price into any Halfords store, ensuring, date and price are shown and we will match the competitor price if within policy.

    Terms & Conditions

    • The competitor's item must be identical (colour, size etc)
    • The competitor's item must be in stock at the time of match
    • The competitor's price must include delivery
    • The competitors price must be publically advertised online and cannot include any membership/personal discounts
    • We cannot match bulk promotional offers such as buy one get one free
    • The competitor must be based in the UK and sell direct to customers (no auction or marketplace retailers)
    • No other promotional offers or vouchers can be used on top of a price match
    • We will match within 7 days of receipt of purchase
    • If purchased from store the match must be from a store within 20 miles radius
    • We will match in store if our online price is lower than our store price
    • We will not match against clearance, closing down sales or specialist retailers such as market stalls.
  • You can buy this product from one of our carefully selected Approved Partners. The full list of options available are below. Simply add your chosen option to your basket and proceed to checkout when you're ready.

    You can purchase products supplied by Halfords and selected other suppliers on

    Checkout is always via and all payment will be taken via In checkout the products will be split into separate deliveries for each supplier.

    Showing 1 - X of our buying options
    Price Seller Info Purchase

Some of the parts we sell here at Halfords have been reconditioned. These will carry a Refundable Deposit or an extra surcharge amount. When you add one of these reconditioned items to your basket, we'll add this extra cost automatically.

Once you've sent us your old item we'll check it over, and then refund you the full surcharge as long as everything is ok.

Before you return your old unit please make sure it's in re-serviceable condition. So if you're returning caliper casings, you'll need to double check they aren't badly damaged or broken. If the part you've sent is found to be unserviceable, we reserve the right not to refund the surcharge.

Please note that if you're returning your old unit to our National Returns Centre then this will be at your own expense.

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Shimano Gears, Drivetrain & Cables

Shimano CS-HG20 7 Speed Cassette 12-28T

£9.99 The Shimano CS-HG20 7-speed Cassette is compatible with 7-speed HG chains.