Performance of grapevines and cluster quality of cultivar. Flame seedless grape under different node load cm-2 Trunk Cross-Sectional Area (TCSA) were studied in the 2009/2010 and 2010/2011 seasons. Treatments comprised 2, 3, 4 or 5 nodes cm-2 TCSA under double T-type trellis system. Parameters such as bud behavior, vegetative growth, nitrogen, phosphorus and potassium leaf content, clusters and berries characteristics, yield and total carbohydrates in the canes were measured in an effort to establish the best node load level cm-2 TCSA for this cultivar. A negative relationship was found between node load levels cm-2 TCSA and most parameters such as bud behavior, vegetative growth, leaf mineral content, weight, length and width of clusters, weight and diameter of berries, Soluble Solid Content (SSC), SSC/acid ratio, total anthocyanin and total carbohydrates in canes, but the other estimated parameters such as titratable acidity and yield showed a positive relationship in this respect. Considering all parameters, the node load level of 2 or 3 nodes cm-2 TCSA showed the best performance of grapevines and cluster quality of cultivar Flame seedless.