Equal-i-zer 90-02-4100
2 in receiver · 3 in drop / 7 in rise
12-inch hitch shank with six head-position holes. For a compatible weight-distribution head and the specified receiver size.
Equal-i-zer Hitch Shanks: 2 vs 2½-Inch Receiver Size Guide
Equal-i-zer weight-distribution shanks let the hitch head be positioned to match a trailer's coupler height. The first decision is the tow vehicle's receiver opening: a 2-inch shank and a 2½-inch shank are not the same size. From there, compare the rise or drop required to level the trailer. The six exact model numbers below offer three height ranges in either receiver size, all with 12-inch shank length.
Measure the receiver and required height change
1. Confirm receiver sizeMeasure or check the rated receiver opening on the tow vehicle: 2 inches or 2½ inches. Use the correctly sized shank rather than assuming the two receiver dimensions interchange.
2. Determine head heightWith the vehicle and trailer on level ground, compare the receiver and coupler setup using Equal-i-zer's hitch-height instructions. The maker measures shank adjustability from the inside top of the receiver to the base of the hitch ball.
3. Match the hitch headAll six shanks are 12 inches long and feature six mounting holes. Confirm the compatible weight-distribution head, fasteners, trailer loading and allowable towing ratings before installation.
Hitch ratings still apply: Changing the shank does not increase the vehicle's rated towing or payload capacity. Equal-i-zer offers distinct shank families for certain 4K hitches and 6K–16K setups. Check your exact hitch model and head before ordering; selecting only by receiver size is not enough.
Equal-i-zer 90-02 shank rise, drop and receiver chart
These model-specific dimensions come from the manufacturer's shank selection chart. Drop and rise are the rated height-adjustment ranges, not the physical length of the upright plate.
| MPN | Receiver | Drop | Rise | Length | Product |
|---|---|---|---|---|---|
| 90-02-4100 | 2 in | 3 in | 7 in | 12 in | View |
| 90-02-4125 | 2½ in | 3 in | 7 in | 12 in | View |
| 90-02-4200 | 2 in | 4 in | 8 in | 12 in | View |
| 90-02-4225 | 2½ in | 4 in | 8 in | 12 in | View |
| 90-02-4300 | 2 in | 6 in | 10 in | 12 in | View |
| 90-02-4325 | 2½ in | 6 in | 10 in | 12 in | View |
Shop by exact manufacturer part number
The product images and links identify the exact shank listings at NewRVParts. Where a higher rise or drop is needed, select from the manufacturer's extended-height shank models after confirming hitch compatibility.
Equal-i-zer 90-02-4125
2½ in receiver · 3 in drop / 7 in rise
12-inch hitch shank with six head-position holes. For a compatible weight-distribution head and the specified receiver size.
Equal-i-zer 90-02-4200
2 in receiver · 4 in drop / 8 in rise
12-inch hitch shank with six head-position holes. For a compatible weight-distribution head and the specified receiver size.
Equal-i-zer 90-02-4225
2½ in receiver · 4 in drop / 8 in rise
12-inch hitch shank with six head-position holes. For a compatible weight-distribution head and the specified receiver size.
Equal-i-zer 90-02-4300
2 in receiver · 6 in drop / 10 in rise
12-inch hitch shank with six head-position holes. For a compatible weight-distribution head and the specified receiver size.
Equal-i-zer 90-02-4325
2½ in receiver · 6 in drop / 10 in rise
12-inch hitch shank with six head-position holes. For a compatible weight-distribution head and the specified receiver size.
Equal-i-zer shank selection questions
Is 90-02-4100 the same as 90-02-4125?
No. Both have 3 inches of drop, 7 inches of rise and 12-inch shank length, but 90-02-4100 fits a 2-inch receiver while 90-02-4125 is for a 2½-inch receiver.
What if I need 6 inches of drop?
Within this group, 90-02-4300 provides 6-inch drop/10-inch rise for a 2-inch receiver; 90-02-4325 provides the same adjustment in a 2½-inch receiver shank.
Does a weight-distribution shank replace the entire hitch?
No. A shank is the receiver-side component that holds the compatible hitch head. The spring arms, head, trailer brackets and installation hardware remain separate parts of the complete system.
Can I use these shanks on an Equal-i-zer 4K light-duty hitch?
Do not assume so. Equal-i-zer lists separate adjustable-shank models for its 400/4,000-lb hitch. Verify the exact head and manufacturer-approved shank family.
How is the rise or drop measured?
Equal-i-zer measures the adjustable head height from the inside top of the tow vehicle's receiver opening to the base of the hitch ball. Follow the manufacturer's measurement method rather than measuring the total steel shank height.
Related Equal-i-zer hitch parts diagrams
- Equal-i-zer 6K–14K 4-Point Sway Hitch Illustrated Parts Guide
- Equal-i-zer 16K 90-00-1600 Hitch Exploded Parts Diagram
Follow the current Equal-i-zer owner’s manual when setting hitch-head height and angle, tightening fasteners and checking spring-bar loading before travel.
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