Review of Shimano HG70 7-Speed 11-28 Cassette

Shimano HG70 7-Speed 11-28 Cassette
By: Shimano Average Rating: 5.0 Total Reviews: 1
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Shimano HG70 11-28 Cassette

On: 2009-07-15

My conclusion is the Shimano HG70 provides better, crisper shifting than HG30, when comparing cassettes with identical ratios. My original HG30 with Alivio setup on my $400 GT Bicycle had almost zero miles (not worn at all), but it was ALWAYS a bit stubborn...grinding and refusing to upshift one gear at a time. Adjusting the cable in the other direction invariably caused unreliable downshifts. You had to skip two gears or more at times to complete a shift and then quickly backshift one gear. I discovered adjustment was not the issue. I wasted money on premium shifters, cables, upgrade to superior Deore derailleurs & repeatedly adjusted until I decided to replace the silly cassette last week. Sham wow, issue FIXED. Hey, dont be afraid to waste $25 on this oft-ignored component...it made my 15yo GT bicycle shift far better than new. Shifts are now very positive and reliable. The difference between the HG30 and 70 is significant from a technical design perspective. The HG70 clearly has more engineering provisions in its design to coax the chain from one sprocket to another. you can see it comparing them on the workbench.