Many gear shifting issues can be solved by ensuring that the derailleur hanger is perfectly true; this is where the Park Tool DAG-3 Derailleur Hanger Alignment Gauge comes in. It is used to check the hanger for alignment and then can be used to straighten it so that that derailleur sits in exactly the right place. It can be used with wheels from 16-29” and can even be used on bikes that have a rack or mudguard fitted. As it has been engineered to Park Tool’s exacting standards, it is both long-lasting and highly accurate.
I had constant shifting problems. I was on the point of buying a new chain and cassette until I spoke to a LBS owner who recommended getting a chain alignment tool. Given that I was going to spend £60 on my first option, I bought the Park Tool DAG-3. Sorted my issues out on one bike then found the same mis-alignment on 2 others!
Free UK delivery on orders over £50. Orders are dispatched within 1-2 working days and typically arrive 1-2 working days later.
Return unused items in their original packaging within 30 days of delivery. Return postage is £3.50.
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