EXHIBIT 5.01


                             December 12, 1996


Radius Inc.
215 Moffett Park Dr.
Sunnyvale, California 94089


Gentlemen/Ladies:

   At your request, we have examined the Registration Statement on Form S-8 
(the "REGISTRATION STATEMENT") to be filed by you with the Securities and 
Exchange Commission on or about December 12, 1996 in connection with the 
registration under the Securities Act of 1933, as amended, of an aggregate of 
3,566,620 shares of your Common Stock (the "STOCK") subject to issuance by 
you pursuant to the Radius Inc. 1995 Stock Option Plan, as amended by 
Amendment No. 1 and Amendment No. 2 thereto, each dated December 12, 1996 (as 
amended, the "PLAN"),

   In rendering this opinion, we have examined the following:

   (1)   the Registration Statement, together with the Exhibits filed as a 
part thereof, including, without limitation, the Plan and related documents;

   (2)   the Prospectus prepared in connection with the Plan and with the 
Registration Statement;

   (3)   copies of the minutes of meetings and actions by written consent of 
the Board of Directors relating to the approval of the Plan which you have 
provided to us; 

   (4)   the Articles of Incorporation of Radius Inc. ("RADIUS"), as amended 
through September 6, 1996 and the Bylaws of Radius, both as certified by 
Radius on December 12, 1996; and

   (5)   a Management Certificate of even date herewith in which you have 
given us certain factual representations.

   In our examination of documents for purposes of this opinion, we have 
assumed, and express no opinion as to, the genuineness of all signatures on 
original documents, the authenticity of all documents submitted to us as 
originals, the conformity to originals of all documents submitted to us as 
copies, the legal capacity of all natural persons, the lack of any 
undisclosed terminations, modifications, waivers or amendments to any 
documents reviewed by us and the due execution and delivery of all documents 
where due execution and delivery are prerequisites to the effectiveness 
thereof. 

   As to matters of fact relevant to this opinion, we have relied solely upon 
our examination of the documents referred to above and have assumed the 
current accuracy and completeness of 




Radius Inc.
December 12, 1996
Page 2


the information and records included in the documents referred to above.  We 
have made no independent investigations or other attempts to verify the 
accuracy of any of such information or to determine the existence or 
non-existence of any other factual matters; HOWEVER, we are not aware of any 
facts that would lead us to believe that the opinion expressed herein is not 
accurate.  

   Based upon the foregoing, it is our opinion that the Stock, when issued 
and sold by you upon the exercise of stock options granted pursuant to the 
Plan, and the grant of such options, in accordance with the Plan and in the 
manner referred to in the Prospectus associated with the Registration 
Statement, will be legally issued, fully paid and nonassessable.

   We consent to the use of this opinion as an exhibit to the Registration 
Statement and further consent to all references to us, if any, in the 
Registration Statement, the Prospectus constituting a part thereof and any 
amendments thereto.

   This opinion speaks only as of its date and is intended solely for the 
your use as an exhibit to the Registration Statement for the purpose of the 
above issuance of the Stock and is not to be relied upon for any other 
purpose.  

                                    Very truly yours,

                                    FENWICK & WEST LLP