Exhibit 23.1 INDEPENDENT AUDITORS' CONSENT Board of Directors Smithway Motor Xpress Corp.: We consent to the use of our report incorporated herein by reference in this Registration Statement on Form S-8 of Smithway Motor Xpress Corp. /s/ KPMG Peat Marwick LLP KPMG Peat Marwick LLP Des Moines, Iowa June 8, 1999 Page 6 of 7 pages