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Shimano HG20 7-Speed Bicycle Cassette Sprocket 12-28T

by Shimano

RRP: £11.99
Price: £7.99
You Save: £4.00 (33%)
In stock.
Dispatched from and sold by WoollyHatShop.
  • Hyperglide sprockets have a computer designed tooth shape which offers you a smooth and crisp change everytime even under load
  • Corrosion resistant steel cassette lockring
  • Fits 7-speed HG and IG chains
  • Suitable for both mountain and road bikes, Contoured shift gates
  • Ratios : 12,14,16,18,21,24,28T

Frequently Bought Together

Shimano HG20 7-Speed Bicycle Cassette Sprocket 12-28T + Shimano HG40 6,7,8 Speed Mountain Bike Chain + Shimano Tourney FC M131 chainset with chainguard 48 / 38 / 28T 170 mm
Price For All Three: £32.37

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Product details

  • Delivery Destinations: Visit the Delivery Destinations Help page to see where this item can be delivered.
    Find out more about our Delivery Rates and Returns Policy
  • Item model number: CSHG20I7228
  • ASIN: B0073GGQ02
  • Date first available at Amazon.co.uk: 30 Jan 2012
  • Average Customer Review: 4.8 out of 5 stars  See all reviews (5 customer reviews)
  • Amazon Bestsellers Rank: 10,170 in Sports & Outdoors (See Top 100 in Sports & Outdoors)
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Customer Reviews

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Most Helpful Customer Reviews

5 of 5 people found the following review helpful By Peter Piper TOP 500 REVIEWER on 2 Sep 2012
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People are generally a bit scared of changing parts of their bikes, and so they go to Halfords or their local bike shop and are talked into a new bike as "Yyou can't get the parts!" or "It's not worth repairing." This is a big shame as it's usually pretty simple and cheap to revitalise most decent old bikes upto a pretty much new performance. (Your older legs may be the biggest problem!)

The Shimano HG (HG stands for HperGlide) cassettes are generally excellent, but bear in mind the Shimano HG range varies in price/quality. A general rule is that the higher the number, the better the quality (and higher the price). Given that the numbers range in quality from around HG20 (low) to HG80+ (high), this HG20 cassette is very much at the cheap end of the HG range.

The bottom three gears (28, 24 & 21) are rivited together and so you can't split the cassette and use the cogs individually, which is worth knowing if you're of the Sheldon Brown (Google him) ilk.

I bought it to replace my worn and ancient 7-speed cassette on my old Giant Boulder. I'd been assured by my local bike shop that it wasn't worth doing and they couldn't get the parts any more and they had a great deal on a £500 Dawes etc. So I did a little research and found out it's a pretty simple job, and as ever you can find pretty much anything you like on Amazon, so I thought I'd go for it. I swapped the cassette over and bought a new chain and tried it out. Whilst I've lost my fast 11t cog, I now have comfortable two teeth jumps through 12,14,16,18 instead of the slightly annoying three tooth jump I had in my original 11,13,15,18 range. My chainset (the front gear rings) didn't like the new chain so I had that changed by (another) LBS.
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Th shimano hg20 7-speed cassette sprocket arrived on time and I changed it onto my Dahon vittess fold up bike, and it really works a treat. No more slipping in 7,6,and 5th gears.
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By tandem on 8 April 2014
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- extremely good value with product meeting all expectations. Excellent service from supplier. Able to fit and be back on the road in a very short time
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This item is exactly what I wanted. However, this is a cassette and I originally had a freewheel. This meant that I also had to purchase a new wheel.
When the wheel came though, this cassette fitted on it fine. I did however require a 3mm spacer as the wheel was 8/9 speed.

I have also ended up with a slightly loose cassette as when I have tightened the lockring, there is still play in the cassette. It makes an annoying jingling sound. I suspect this could be solved by making a DIY job of producing something to stop it moving though.

The quality of the item is great. It is made out of a standard material and is no different to other types of cassettes.

Overall, the product has met my satisfaction and I am happy with it.
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By glenn beaver on 28 July 2014
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speedy delivery, works great, thanks
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