How to identify
Remove the roller housing and look at the back mounting shape. Tab style is independent of wheel diameter and material, so match the tab first, then confirm measurements in the Roller Finder.
A stepped back flange that looks like a blocky capital F when viewed from the rear.
Common mix-up: T-Tabs or Plain Back when the upper ledge is small or bent.
Photograph: Rear straight on so the F outline is obvious.
Shop F-Tab rollers
A curved or J-shaped finger on the back that catches a slot instead of using a screw shelf.
Common mix-up: Snap-In when the hook looks springy instead of rigid.
Photograph: Rear corner plus a side view of the hook curve.
Shop Hook rollers
A straight centered bar with short top and bottom feet that reads as a capital I.
Common mix-up: T-Tabs when the bottom foot is longer than the top.
Photograph: Direct rear shot showing both feet.
Shop I-Tab rollers
A short tab that projects and bends at a right angle, forming a clear L for side-screw mounting.
Common mix-up: Hooks when the bend is rounded, or Plain Back if the L broke off.
Photograph: Rear corner and side view of the 90-degree bend.
Shop L-Tab rollers
Springy side or back clips that flex into a slot so the roller snaps in place without a rigid screw tab.
Common mix-up: Hooks, because both catch the frame instead of using a screw shelf.
Photograph: Back and both side edges showing every clip tip.
Shop Snap-In rollers
A centered tab with a wide top crossbar on a vertical stem, like a capital T.
Common mix-up: F-Tabs or I-Tabs when a lower ledge makes the outline unclear.
Photograph: Rear centered on the single top crossbar.
Shop T-Tab rollers
The whole rear wraps three sides like a squared U, enclosing the wheel area.
Common mix-up: U-Tabs, which use a small U bracket instead of a full rear wrap.
Photograph: Rear plus a slight angle showing both side flanges.
Shop U-Back rollers
A distinct U-shaped bracket on the back that forks out from the rear face.
Common mix-up: U-Backs when people see a U shape but miss that only the tab is U-shaped.
Photograph: Close rear view of the U bracket, straight on.
Shop U-Tab rollers
An open-ended tab that looks like a squared C and often clips or hangs on a flange.
Common mix-up: U-Tabs when the opening is narrow, or Hooks if only one leg remains.
Photograph: Rear focused on the open side of the C.
Shop C-Tab rollers
A smooth rear housing with no built-out tab, hook, or bracket. Screws mount through the flat back.
Common mix-up: Any broken-off tab style, especially L-Tabs and Hooks.
Photograph: Full rear of the housing showing no projections.
Shop Plain Back rollers
A simple flat plate across part of the tandem housing for screw mounting.
Common mix-up: Plain Back when the plate is small, or B-Tab when notched.
Photograph: Rear showing the plate outline against the housing.
Shop Flat Tab tandems
A flat tab with a hooked end that engages the frame, combining a plate and a hook.
Common mix-up: Single Hooks, or Flat Tab when the tip is bent straight.
Photograph: Rear corner showing both the flat part and the hook tip.
Shop Hook Tab tandems
A rear frame with two sides and a bottom but no solid top plate, leaving the upper back open.
Common mix-up: F-Tab when the bottom crosspiece looks like a lower F bar.
Photograph: Rear at a slight upward angle to show the open top.
Shop Open Top tandems
Two wheels with a smooth rear surface and no distinct tab shape. Screws go through the flat back.
Common mix-up: Flat Tab or B-Tab when a small stamped ledge is mistaken for a tab.
Photograph: Full rear behind both wheels.
Shop Plain Back tandems
A stepped rear flange that looks like a capital F behind a two-wheel housing.
Common mix-up: E-Tab when ledges look like three steps, or Flat Tab when the upper ledge is worn.
Photograph: Straight rear shot of both ledges on the spine.
Shop F-Tab tandems
A stepped, offset tab edge that zig-zags like an S when viewed from behind.
Common mix-up: E-Tab and F-Tab. S-Tab has the most offset edge.
Photograph: Rear that shows the irregular edge clearly.
Shop S-Tab tandems
A rear tab with a vertical spine and multiple horizontal bars on one side, like a capital E.
Common mix-up: F-Tab when one bar is missing, or S-Tab when bar edges are offset.
Photograph: Square rear shot showing all horizontal bars.
Shop E-Tab tandems
A clip-like back tab whose outline is a squared C with one side open.
Common mix-up: B-Tab when the opening is small, or Open Top when the whole frame is mistaken for the tab.
Photograph: Tight rear view of the open side of the C.
Shop C-Tab tandems
A back tab with two rounded or squared lobes that read like a capital B.
Common mix-up: E-Tab and S-Tab. Look for two similar lobes.
Photograph: Rear centered on both lobes and the vertical bar.
Shop B-Tab tandems