Complex sentence: The sole material and amount of tread used in a shoe affects its weight; an expensive pair of road shoes with carbon fibre soles can weigh 650 grams, while a budget-priced pair of mountain bike shoes might weigh 850 to 900 grams.
Split into simpler sentences: The sole material and amount of tread used in a shoe can dramatically affect its weight. For example, an expensive pair of road shoes with carbon fibre soles can weigh 650 grams, while a budget-priced pair of mountain bike shoes might weigh 850 to 900 grams.