What You're Actually Buying
This is the shaft that rotates when the brake chamber pushes the slack adjuster, forcing the S-cam to spread the shoes against the drum. Right-hand rotation, 28 spline on the slack adjuster end, 17.31" overall length - that combo is specific to certain trailer axle widths and brake sizes, mostly 16.5" x 7" or 16.5" x 8-5/8" drum setups.
It ships as a bare camshaft. You're reusing your bushings, seals, and rollers unless you're doing a full kit - so pull the old shaft and measure before you assume this is a straight swap.
Why These Numbers Cross
R607083, 2210-D-6868, 2210-S-8157, CS41111, 41111, and 17-722 all show up because different manufacturers - Meritor, Gunite, and a few aftermarket houses - built camshafts to the same length, spline count, and rotation for the same axle families. Spline count and rotation (RH vs LH) are the two things that will stop a cross cold if they don't match.
Arm length and cam profile also have to line up with your slack adjuster and brake shoes. A 28-spline shaft that's a half inch off in length won't seat right in the spider, and a mismatched cam lift will chew through your shoes fast or leave you short on stroke.
Bottom line - these numbers cross because the physical dimensions match, not because everyone just relabeled the same part. Still confirm against your old shaft or VIN before you order.
Ordering From PartStop
We're in Tacoma and keep this one on the shelf for same-day pickup or will/call. Ship nationwide if you're not local - most orders go out same day if you call before early afternoon.
Comes with our standard 6+ month warranty. If the length or spline doesn't match what you pull off the trailer, call us before you install it - way easier to swap a part than to warranty one that's already been welded into a brake job.
E5507 Cross-Reference & Interchange Numbers
These manufacturer and aftermarket numbers commonly cross-reference to E5507. Use them to identify the part — then confirm the exact fit by VIN or the number stamped on your old unit before you order. An interchange is a starting point, not a fitment guarantee.
| Brand / Line | Cross-Reference Numbers |
|---|---|
| OE/Cross-Ref | R607083, 2210-D-6868, 2210-S-8157, CS41111, 41111, 17-722, 122.281710.04 |
Frequently asked questions
Does E5507 fit my trailer?
Depends on your drum size, spline count, and rotation - not just the trailer brand. Pull your old camshaft, check for RH stamp, count the splines (should be 28), and measure overall length. If it's 17.31" RH 28-spline for a 16.5" drum, you're in the right ballpark, but confirm against the VIN or old part number before ordering.
Is this the same as CS41111?
CS41111 cross-references to E5507 because it matches on spline count, length, and rotation for the same 16.5" drum application. It's not a Meritor-branded part, it's an aftermarket cross - functionally it's built to the same spec, but always verify against your old shaft since a couple manufacturers have made slight variations over the years.
Can I use this if my trailer has 15" drums instead of 16.5"?
No - this shaft is spec'd for 16.5" drum brakes. A 15" drum setup typically runs a shorter camshaft with different cam lift. Using the wrong length will throw off your brake stroke and could cause the shoes to drag or not fully release. Check your drum size off the tag or measure it directly.
Not sure it fits? We check before you pay.
Run your VIN and we’ll match parts to your exact truck, or call the counter — a person who knows trucks verifies fitment by OEM number before the order ships. No wrong-box returns.
More cross-reference guides
Need the part, not just the reading?
Every part below is a Premium Quality aftermarket Direct Replacement with published OEM cross-reference numbers, a 6+ month warranty and same-business-day shipping from Tacoma, WA. Not sure it fits? Run your VIN — or call and a person who knows trucks will verify fitment before you pay.