新君威改轮毂轮胎 原厂：225⼀55⼀17 改为：225⼀45⼀18 时速表差别大吗? 舒适多差别大吗?
推荐回答（3个）
差别不是很大 舒适性会降低 操控性能会变好 轮胎周长变小了 车辆重心变低了 时速表显示的会比实际车速慢 但是慢的不多
可以改为245 45 18的 这样差别就小了 跑起来更稳 舒适性也差不多
气压打2.2到2.5之间就可以 不要超过3.0
改成245的行驶时舒适度基本不会降低 但是油耗会增加
225 55 17改成245 45 18速度相差几乎没有 基本一个速度 是正常升级尺寸
225 55 174改225 45 18 时速相差会不超过5公里 具体没算 你i计算算吧 很简单
轮胎的高宽比数字越小（越扁平的轮胎）,车辆的操控性就越好，但舒适性可能会下降，而且轮胎撞击异物时鼓包的机率可能会增加。
轮胎改装时需要考虑以下各种因素：
1.当地交通条例（不会影响车辆年检通过、车辆保修等）；
2.轮胎的速度和负载指数；
3.轮辋的规格，如:宽度和偏移度等；
4.空间；
5.车子的悬挂系统；
6.(重要的)轮胎的负重半径保持不变；
所以建议轮胎规格转换和安装等事宜必须由专业人员进行。必要时向汽车制造厂咨询有关法律法规事宜。
您好，非常感谢您对别克品牌的关注，关于您所咨询的问题，具体详情请咨询当地经销商！感谢您的支持！
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