SPEC SHEET · K-D-CAT777 · REV. 03 · 2026

CATERPILLAR 777 SPOKES
SPEC SHEET

Part code
K-D-CAT777
Diameter
49 in / 1 186 mm
Rated load
100 t
Compliance
ISO 4250-3 · AS 4457 · GB/T 2883
01 · DIMENSIONS

CRITICAL DIMENSIONS

Cross-section drawing of the K-D-CAT777 rim assembly. Five reference dimensions (A–E) are CNC-machined to the tolerances called out in the table and verified on a 5-axis CMM before every unit ships.

CATERPILLAR 777 SPOKES cross-section dimensions
Figure 1 — Cross-section & dimensionsdrawing K-D-CAT777 · rev. 03 · 2026
REFDIMENSIONVALUETOLERANCE
ADisc outer ⌀1 185.6 mm±0.30 mm
BSpoke pattern ⌀975 mm±0.20 mm
CDisc face thickness32 mm±0.10 mm
02 · ASSEMBLY

WHEEL-END ANATOMY

The complete CATERPILLAR 777 SPOKES wheel-end is a five-piece assembly. Every Kelios rim ships as a matched set — rim base, lock ring, side rings, and bead seat band — with the OEM-supplied hub remaining factory original.

CATERPILLAR 777 SPOKES wheel-end anatomy with labeled components
Figure 2 — Wheel-end anatomycross-section · five-piece assembly
1
Side ring
Pairs with 49" outer flange — Cat 777 series
2
Bead seat band
Pairs with K-BSB-51 — 51"/49" bead interface
3
Lock ring
Pairs with K-LR-EU57 / K-LR-S39 — single-style retaining
4
Rim base
Pairs with K-RB-CAT994K — 49" loader / haul rim base
5
Wheel hub
This unit — aerospace forging, CT-inspected, OEM Cat 777 spoke pattern
03 · FEA

FINITE ELEMENT ANALYSIS

Every Kelios rim design is validated under 1.4× rated load in a Von Mises FEA solver before tooling is cut. The K-D-CAT777 was meshed at refined element size with concentration at the lock-ring seat and bead radii — the two locations where field failures historically initiate.

CATERPILLAR 777 SPOKES FEA stress visualization with Von Mises legend
Figure 3 — Von Mises stress & deformationsolver: SolidWorks Simulation · load case: 1.4× rated
Max Von Mises stress
6.74×10⁷ N/m²
Peak stress under 1.4× rated load — at the spoke transition radius.
Yield safety factor
2.3×
Vs. HSLA 7075-T6 — 503 MPa yield.
Mesh elements
1.42M
Tetrahedral mesh — 0.5 mm element size at spoke fillets.
Deformation (max)
1.86mm
Elastic deformation under peak load — fully recovered.

NEED THE FULL 174-PAGE CATERPILLAR 777 SPOKES SPEC PACK?

The complete K-D-CAT777 catalog ships as a signed PDF with all five component drawings, the FEA report, material certificates, and a heat-lot traceable QC sheet for every unit you order.

Kelios — OTR Wheels Engineered to Endure