DRW vs SRW safety, tire blowout

Grit dog wrote:

3 tons wrote:

Bedlam wrote:
Since the frame pivots on the axle at same point of a DRW and SRW pickups, I think the stability comes more from sidewall stiffness and higher rated springs. Until you start picking up a rear wheel I do not feel the width plays a role.

Believe whatever you like…as I stated, not from pontification but from actual real back to back experience from having two identical trucks differing ONLY in SRW vs DRW, there IS an outrigger effect, but honestly I almost feel like I’m barking at the moon, so for those doubting Thomas’s enjoy your comfort providing paradigm and feel free to disregard…:)

3 tons

Think geometry for a moment.

With the same spring set and same load the DRW actually has MORE leverage against the spring set than the SRW does so the suspension will have more sway with a DRW then a SRW. (the pivot point is the center where the axle spring pack make contact and the leverage point is the outside of the tire)

However most will claim a DRW is "more stable" because twice as many sidewalls reduce the sidewall flex considerably. The reduction in sidewall flex is much greater than the additional suspension leverage resulting in reduced sway or "more stable" ride.

For SRW's switching to commercial rated tires with fairly to very stiff sidewalls is equally or more effective.


- Mark0.