Variation in timber yield, basic wood density, percentage of volumetric shrinkage and the proportion of tension wood in mature trees of 10 clones of Hevea brasiliensis viz. RRII 44, RRII 45, RRII 105, PB 235, PB 255, PB 260, PB 261, PB 310, PB 311 and RRIM 600 were studied. The timber volume (bole volume) of PB 235 was statistically superior to RRII 105, RRII 45 and PB 235. The clone RRII 105 showed the lowest bole volume among the ten clones studied. The basic wood density at different height positions within clones as well as between clones was the highest in RRII 105 and the lowest in PB 260. The wood denstity of RRII 105 was significantly higher than that of the other nine clones. The percentage of volumetric shrinkage in different drying conditions viz. green to oven dry and air dry to oven dry, varied considerably at different height positions within clones as well as between clones. Percentage of volumetric shrinkage was significantly higher in PB 235 (green to air dry condition) than that of the other eight clones and on par with RRII 105. The distribution pattern of tension wood varied from tree to tree, clone to clone and even within trees along the length of the trunk. Among the 10 clones, the percentage of tension wood was the highest in RRII 45 and the lowest in RRIM 600 and RRII 105. However, the clonal variation as well as variation at different height positions were not statistically significant. The present study revealed that though volumetric timber yield in RRII 105 is low, the wood quality of this clone is superior with respect to basic density, low level of volumetric shrinkage and less incidence of tension wood.