chances are the the Polar is a narrow 26" etrto 559, a 650c is slightly larger at etrto 571 and a slick MTB tyre such as 26 x 1" should fit ok........
@saxby's started
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chances are the the Polar is a narrow 26" etrto 559, a 650c is slightly larger at etrto 571 and a slick MTB tyre such as 26 x 1" should fit ok........