- Shimano HG70-I 8 Speed Cassette
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This Shimano HG70-I 8 Speed Cassette is no longer available although you may find similar or newer versions below:
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Shimano HG70-I 8 Speed Cassette
Shimano HG70-I 8 Speed Cassette
High quality 8-speed cassette
Top Features of the Shimano HG70-I 8 Speed Cassette
- Sprockets are cut away to further reduce weight without reducing rigidity
- Pearl-bright finish offers hard wearing resistance to corrosion
- Pearl-bright steel cassette lockring
- For Narrow 8-speed IG chains
IG sprockets have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth up-shifts and down-shifts. The close ratio gearing allows a more efficient use of energy through finer cadence control.
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
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If I replaced an 8-speed rear gear with a 9 or 10 speed rear gear, would I have to replace the sti levers?
Thanks if you can advise.
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