Westside Discs BT Medium Harp Putter Disc Golf 173-176g Review (2026)

Who the BT Medium Harp fits

Westside markets the Harp as its most reliable approach disc, built to hold in wind, and the company's flight numbers of 4 speed, 3 glide, 0 turn and 3 fade explain why. That level of fade puts the Harp above a straight putter like the Pure or Envy, so it suits players who want a disc that finishes hard left rather than gliding out flat. It works well for spike hyzer approach shots, where the goal is a steep drop rather than distance, and for players who throw into headwinds and need a disc that will not turn over. Westside notes the Harp serves both professional players and those with slower arm speeds, since its stability is a function of the mold shape as much as arm speed, so beginners get similar fade to advanced throwers on a normal release.

Specs and the BT Medium plastic

This listing covers the 173 to 176 gram Harp, close to the mold's published maximum weight of 176 grams, with a 21.2cm diameter and a 1.6cm rim height that Westside lists for the disc. That is a fairly flat, low profile shape rather than a deep rim putter, with an ultra flat top that helps the disc sit stable in the hand on firm releases. BT Medium sits in the middle of Westside's BT plastic line, described by the company as suited to all conditions with a tacky grip and good durability. It keeps some give in cold weather rather than going hard and slick, and holds its shape in heat rather than going soft, which the company positions as a comfort focused middle ground between its softer and firmer BT blends.

Living with the Harp day to day

Because BT Medium is a grippy, softer blend rather than one of Westside's premium VIP plastics, expect it to show scuffs and wear marks sooner, particularly if it lands on cart paths or rocky terrain around a basket. That wear does not immediately change the flight the way it would on a cheaper base plastic, but the surface will roughen with repeated hits before the disc eventually beats in and turns slightly less overstable. Basic care is standard: rinse mud off after wet rounds and avoid long stretches in a hot car, since BT plastic can soften in sustained heat. Players who throw a lot of forced hyzers and spike shots should expect to replace a BT Medium Harp sooner than a same shaped disc in a harder, more scuff resistant plastic.

Trade offs against other approach discs

Against named rivals in the same approach disc group, the Discraft Paul McBeth Elite Z Zone and Westside's own VIP Harp both use firmer, more durable plastics that hold their flight longer under heavy course wear, so players focused purely on longevity may prefer one of those over the BT Medium blend here. What the BT Medium Harp offers instead is a stickier, more textured grip right out of the package, which some players find easier to control on a firm, flat release. The Harp's overstable finish also needs a small aim adjustment on shots meant to go straight or turn slightly right, since the disc will pull left more than a neutral putter on the same line.

Verdict and who should pick something else

The BT Medium Harp is a strong pick for a player who wants a dependable, overstable approach disc for spike hyzers and windy upshots, and who does not mind trading some plastic longevity for extra grip. It is a weaker choice for a player who wants a straight, controllable approach shot or who wants maximum plastic durability over grip feel, since the overstable finish and softer BT blend work against both of those goals. Those players, and anyone who plays mostly on rocky or paved courses where scuffing adds up fast, should look at a straighter disc or Westside's firmer VIP Harp instead.

Frequently asked questions