请问电动车后轮空转阻力很大怎么回事啊?

页面:/news/view-2994926/ | 耗时:0.3667 s | 内存:1.89 MB | 查询:4 | 缓存读取:4 写入:0 | 加载文件:23
select * from tbl_Articles WHERE ArticleID=2994926 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2994926 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2994926 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(359272,98291,850845,2038774,457833,446481,3260189,1402012,2954226,1023581,398713,440629,849353,745101,1114295,611364,463739,82380,747549,446016,667945,1535991,425645,654134,1173854,1199020,998397,902472,945394,642480) ORDER BY field (ArticleID,359272,98291,850845,2038774,457833,446481,3260189,1402012,2954226,1023581,398713,440629,849353,745101,1114295,611364,463739,82380,747549,446016,667945,1535991,425645,654134,1173854,1199020,998397,902472,945394,642480)