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The Laurel Cyclery is open for pick up of completed repairs and online purchases of bikes, accessory and parts. Curbside walk-up service for in-stock items is also available. Repairs, tune ups, and safety checks are done only through scheduled appointments (see our website for more information).

Please note that due to high demand, there's a 10-14 day turnaround on assembly of bicycle purchases. We will reach out to folks to schedule bike pick ups. Please email us to confirm that your bike is ready for pick up.

Repair priority is extended to essential workers, immunocompromised people and/or houseless folks. If you fall into one of these categories, or have a unique situation that defies category, please contact us at the shop or

Donnelly Cycling BOS Tubular

Donnelly Cycling BOS Tubular
700 x 33c
Please select options


BOS is the airport code for Boston, Massachusetts, the original hotbed of North American ‘cross and home to some of the harshest weather and the toughest courses. If you’re pinning on a number in New England you better be ready for rain, roots, ruts and mud. And, you better have a set of Donnelly BOS tubulars in your quiver. This tire is even more aggressive than our mud-proven PDX. It features buttressed side-knobs for outstanding traction in super muddy corners and off-cambers, and a center tread pattern that is all bite when it comes down to a tractor pull.

- 700 x 33mm

- 386 grams

- Tubular

Part #:
- D50030

Product Features:
- Buttressed side-knobs for superior cornering traction.
- Unique center knob pattern designed for maximum traction when you need it most.
- Soft rubber compound provides extra grip and shock absorption.
- Tubeless design means an airtight casing with no inner tube to puncture.
- Rubber-coated sidewalls are extremely durable and prevent deterioration from water, mud and dirt.
- No additional sidewall coating necessary.
- All in one construction means tread will not peel away from the tubular casing.
- Precision design creates a straight tire with no variances in size or alignment.
- The tire and base tape are consistently straight making it easy to glue and install to your wheel.
- A removable valve core allows for valve extenders installation as well as insertion of tire sealant.
- Liquid sealant can be used with all Donnelly tubulars to prevent or repair typical punctures.

Part Numbers

Option UPC MPN
Black / 700 x 33c 815507011486 D50030