Spurs for the Valentine
Although less so than the Matilda, the Valentine still suffered from problems with traction. This problem was most prevalent during the winter, which was confirmed by trials of a Valentine II at Kubinka.
"Trials of the tank in winter conditions showed that the shape of the track links does not provide traction with the ground, as a result of which the performance of the tank is insufficient in winter."
The solution was discovered during the trials. Engineers from the attached research institute developed two types of spurs that were produced and tested. The first type involved welding on 35 mm long grousers. The second type was better designed and allowed removal when necessary. It was held in place by the stock track pin. According to results of the trials, both types of spurs were deemed reliable. Seemingly, both were sent into the army.
Two types of spurs developed in the winter of 1942.
Work on spurs did not end here. In November of 1943, a certain Zakharenkov proposed permanent spurs produced from "angled iron made into a wavy shape" and welded onto the track. Having studied the proposal, the proving grounds concluded that it did not make sense to produce this design. It was difficult to produce in the field and the nature of the spurs made them impossible to remove when driving on good quality roads.
In May of 1943, a group at the proving grounds research institute consisting of Technician-Lieutenant A.S. Lobakov, Engineer-Major A.M. Zenin and Engineer-Captain I.A. Kondrashev designed an improved type of removable spurs. The biggest change was in the shape of the grouser, which made driving on snow easier. Trials showed that this design radically improved performance on snow.