Since 1991, Tides Marine has provided essential marine components to the marine industry. At Tides, providing excellent customer service is our no. 1 priority and we proudly manufacture our Shaft Seals, Rudder Bearings and Sail Track in Deerfield Beach, Florida. Our products improve vessel performance and reliability, solve unique system issues, reduce the need for scheduled maintenance and provide worry-free, long-term boating enjoyment. We are the US Master Distributor for MATE-USA Pumps, Horns & Rubrail as well as Super Stainless, a gel based, non-abrasive, stainless steel cleaning agent.

  • Address: 3251 SW 13th Drive STE A
    Deerfield Beach, FL. 33442, USA
  • National Toll Free: 1-800-420-0949
  • Local or International: 954-420-0949
  • Order Fax: 954-420-0945
  • Accounting Fax: 954-420-5234
  • Purchasing Fax: 954-428-5288
  • Contact Us

Internal Width of Existing Luff Groove

Tides prefers to maximize the width of the track shape that enters the luff groove, whether the luff groove has an internal flat shape or internal round shape. If Tides can maximize the amount of UHMW material that goes into the luff groove, the track will perform better when the slides/sail begin to load the track assembly during vessel operation.

Measure the internal width of your luff groove at the mast gate using a tape measure / caliper / etc. In most cases, you can get a fairly accurate measurement of this space by simply measuring the width of the mast gate. It also corresponds roughly to your current slide width. One of these measurements should be satisfactory. See photos and table below.


Below is a table of minimum Internal Flat Luff Groove widths you must have based on the Disc Letter Chosen

Disc Letter Minimum Width
A 0.350"
B 0.375"
C 0.400"
D 0.425"
E 0.450"
F 0.475"
G 0.500"
H 0.525"
I 0.550"
J 0.575"
K 0.600"
L 0.625"
M 0.650"
N 0.675"
O 0.700"
P 0.725"
Q 0.750"
R 0.775"