1934 Harley-Davidson DAH Hillclimber Back to contest Vote Description 1934 Harley-Davidson DAH Hillclimber The sport of hillclimbing grew in popularity throughout the 1920s. Harley's DAH hillclimber, introduced in 1929, was built to compete against the 45-inch Excelsior and Indian twins. Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Δ Share OK More