Shimano HG50 9 Speed Cassette
Shimano HG50 9 Speed Cassette
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Close ratio Mega-9 HG50 cassette, ideal for road and touring use in combination with compact chainsets.
Top Features of the Shimano HG50 9 Speed Cassette
- Close ratio gearing allows a more efficient use ofenergy through finer cadence control
- Sprockets are cut away and drilled to reduce weight without reducing rigidity
- Nickel-plated finish offers hard wearing resistance to corrosion
- Corrosion-resistant steel cassette lockring
- For Super Narrow 9-speed HG chains
- Average weight 270 grams for 12 - 23T
High quality 9-speed cassette. Hyperglide sprockets have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under load
About Cassettes & Freewheels
Cassettes and freewheels for bikes are a cluster of sprockets in a range of sizes offering a multitude of gear ratios. The difference between the two is, a cassette slots onto the freehub, which has the ratchet built in and is then secured with a lockring, whereas a freewheel is a cluster of sprockets built around a ratchet and threads directly on to the hub. Cassettes and freewheels come in many ratios, close ratio is when the number of teeth increase in small increments of 1 or 2 at a time, whereas a wide ratio is when the teeth increase in larger increments of 3 or 4 at a time. Most systems will use a cassette hub as these allow for a wider bearing spacing and increased axle life, you can also fit a larger quantity of sprockets onto a cassette hub with 11 speed systems now becoming available. With cassettes you must use the appropriate spacing for your gear levers and rear mech, Shimano and Campagnolo are not interchangeable so you will need to match the cassette to your levers for smooth and precise shifting. Sram and Shimano chains and cassettes will work together as they use the same spacing.
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Product Q & A
Ask your questions and share your answers.
Are there any disadvantages in the slightly wider spread in the ratio?
Generally the bigger the sprockets the more metal so the more they weigh.
Was going to also purchase a HG 73 9 speed chain to go with the cassette, is this combo OK?
HG53 or HG73 chains are compatible (make sure you get one with the same or more links as you existing chain, links can be removed to match if you have a chain tool)
It's probably a better idea to upgrade the lot to 105 instead of 9 speed. The quality is miles better.
Any idea if the 11/30 will work on the tiagra group set fitted to the specialised allez elite 2011. Presently got 12/25 and heard 12/27 might be the biggest it will take, but no clear info on it that I can find.
For up to a 30 tooth rear sprocket, you may find that you need to replace the rear derailleur also.
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