This spoke is no longer available. Any other straight pull spoke of the right length and 14g thread should be OK to use as long as the rim washer hasn't been lost. This same advice applies for the no-longer-available rear left spoke for WH-R550 (Shimano Part Number Y4BR98150). Our suggested replacement is our item code 0902. It includes a similar rim washer but we cannot guarantee that the rim washer will be compatible. With some effort, we expect you can change it to your safely stored original rim washer if necessary.