J-Strap Black Single Bypass Barn Door Hardware Kit

Total system weight capacity: 220 lbs combined across all doors. For a two-door setup, both doors together must stay under 220 lbs.

Door thickness: 1-3/8 in to 1-3/4 in.

Ceiling clearance above door: 6 in required.

Door overlap when closed: Approximately 6 in at center — the front door's wheel sits between the back door's wheels, so the two doors cannot meet flush edge-to-edge. If a flush center closure is required, see our double bypass hardware.

Wall header: A solid header above the opening is required for track mounting. If there is no existing header or backing in the wall, we recommend installing a minimum 1×6 hardwood board (3/4 in thick × 5-1/2 in wide) that extends past the length of the track to the next stud or structural support point on each side. No solid header and cannot install one? See ceiling mount hardware.

Door width: Each door must cover half the opening plus your chosen wall overlap on the outer edge, plus account for the 6 in center overlap. For standard rooms: each door = (opening + 10 in) ÷ 2. Example: 60 in opening → (60 + 10) ÷ 2 = 35 in per door. See our measuring guide for full formulas.

Door height: Measure from finished floor to the top of the rough opening and add 1 in. The extra inch covers the top of the opening while leaving 1/2 to 1 in of clearance at the bottom for the door to slide without dragging. If you have thick carpet, check that clearance is adequate along the full travel path before ordering.

Track length: Depends on whether you need pass-through access or a fully clear opening — see the track length section below.

Brand: House value line — ships from stock in 2–3 business days

Finish: Black

Track dimensions: 1-1/2 in wide × 1/4 in thick flat track

Wheels: Nylon — quiet, smooth operation. Steel wheel upgrade available — louder but compatible.

Total system weight capacity: 220 lbs (all doors combined)

Door thickness: 1-3/8 in to 1-3/4 in

Ceiling clearance: 6 in above door

Door overlap when closed: Approximately 6 in at center

Configurations: 2, 3, or 4 doors on one track

Finishes available: Black, brushed nickel

Soft close: Not available for single bypass

Handles: Not included — order separately from our handles collection

For sizing guidance see our measuring guide and track length guide.

Single bypass kits include two roller sets — one for the front door and one for the back door — plus a single shared track.

Front door roller set (bent stair-step hanger):

• 1 bent hanger/roller set (2 rollers) — offsets door forward from wall
• Hex bolt set
• 2 L-shape anti-jump disks
• 1 adjustable wall-mounted floor guide — attaches to the back door and constrains the front door across its full travel range

Back door roller set (standard hanger):

• 1 standard J-strap hanger/roller set (2 rollers) — hangs close to the wall on the shared track
• Hex bolt set
• 2 anti-jump disks
• 1 floor-mounted T guide
• 2 door stoppers
• Hex wrench

Shared: Flat track · 4 rubber hole covers (2 for each track end) · spacers, lag bolts, and washers (quantities vary by track length — correct quantities included based on your selection)

Tracks over 7 ft 6 in ship in multiple pieces with a junction plate included. Handles and a latch are not included — add them before checkout to avoid a second shipment.

3-door configuration: Add either an additional standard (flat) hanger set or bent hanger set — a standard flat hanger is recommended for most 3-door setups. The additional set includes the same hardware as the matching set described above.

4-door configuration: Includes 2 standard flat hanger sets and 2 bent hanger sets — double the hardware of the 2-door kit.

Configuring 3 or 4 doors? Email us at info@thebarndoorhardwarestore.com before ordering to confirm the right track length and roller configuration for your opening.

Hardware kits don't include handles or a latch — plan for these before checkout to avoid a second shipment:

Handle: For the room-facing side of each door — browse our handles collection

Flush pull: For the wall-facing side if doors are operated from both sides — browse our flush pulls collection

Latch: Keeps the door closed deliberately — browse our latches collection

Steel wheels: Bypass doors should stay under 110 lbs so nylon wheels are usually sufficient. If you prefer the look of metal wheels, steel wheels are compatible — but note they are louder than nylon. Shop steel wheels

Wall-mounted floor guide for back door: The kit includes a floor-mounted T guide for the back door. If you prefer not to drill into your floors, a wall-mounted floor guide is available separately — browse our floor guides collection

Single bypass track length depends on one decision to make before ordering: do you need pass-through access, or do you want the entire opening fully cleared?

Pass-through (partial access): You slide one door to one side to access roughly half the opening. The track must be at least the opening width plus the planned door overhang outside the opening on each side. For example: if your opening is 60 in and you want the doors to overhang 2 in past each edge, you need at least a 64 in track — round up to the nearest available track length, in this case 5 ft 6 in (66 in).

Clear opening (fully unobstructed): Both doors retract completely. Measure the door panel width, not the rough opening:

2 doors: 3× door width — e.g. two 36 in doors → 9 ft track minimum

3 doors: 5× door width — e.g. three 36 in doors → 15 ft track minimum

4 doors: 6× door width — e.g. four 36 in doors → 18 ft track minimum

Tracks over 7 ft 6 in ship in multiple pieces with a junction plate included. House value line hardware is available in the listed track lengths only — no custom sizing. Email us at info@thebarndoorhardwarestore.com with your opening width and door count to confirm the right track length before ordering.